Collab365

Start Flow from button click on SharePoint Library

Q: Why doesn't 'For a selected item' work in web parts natively?

SharePoint modern page web parts use a lightweight rendering engine that suppresses complex command actions needed for Power Automate side-panel launch (GitHub Issue #6397).

Q: Should I explicitly use GET or POST for the HTTP trigger?

Use GET method for hyperlink clicks from JSON-formatted tags, as browsers send GET requests. Default POST causes TriggerRequestMethodNotValid error.

Q: Why is my flow looping continuously in Method 3?

Missing trigger conditions. Add @equals(triggerOutputs()?['body/TriggerConversion'], true) in flow settings to run only on flag changes and reset flag after.

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Collab365 TeamAuthorPublished Apr 23, 2026

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At a Glance

Target Audience: SharePoint Administrators, Power Automate Developers
Problem Solved: Native executeFlow buttons fail silently in SharePoint document library web parts on modern pages due to rendering engine limitations (GitHub #6397).
Use Case: Automate DOCX to PDF conversion or AI document processing from custom buttons in embedded library web parts.

Yes, you can trigger Power Automate flows from buttons inside SharePoint document library web parts on modern pages in 2026 using HTTP requests or iframe embeds. In 2026, use Power Automate HTTP trigger v2 with SharePoint JSON column formatting schema v2.9 to completely bypass the native platform limitations.

If, like us at Collab365, you have spent your afternoon trying to make the standard "For a selected item" trigger function correctly, only to discover your beautifully formatted custom buttons do absolutely nothing when viewed through a page web part, you are not the first to face this frustration.

This comprehensive guide serves as a direct replacement and update to an unresolved Collab365 forum thread from April 2024. In that thread, a user named Beth Beck asked how to start a flow for a DOCX to PDF conversion straight from a web part button on a SharePoint page. Beth attempted to use JSON column formatting with a setValue action on a Yes/No column named 'ConvertToPDF' to trigger a 'When a file is created or modified' flow. It failed spectacularly.

The comments in that thread were a goldmine of partial solutions. Simon de Lisle correctly suggested using a 'When an HTTP request is received' trigger with a JSON schema for ID passing, using a standard web link with a query string (?ID=). Beth tweaked it but hit a baffling TriggerRequestMethodNotValid error.2 James Williams then chimed in, noting that GitHub issue #6397 explicitly states buttons simply do not work natively in web parts, and he suggested the clever embed web part trick using ?env=Embedded.3

That thread was a fantastic community effort, but it was fragmented, unresolved in certain places, lacked a definitive structure, and entirely predated the massive 2026 updates like Copilot agents in Power Automate, modern list formatting updates, and the evolution of SharePoint Syntex into Microsoft's modern document processing tools.

We have taken all those community learnings, analysed them against the 2026 Power Platform architecture, and compiled them into this definitive, step-by-step tutorial. Grab a coffee, and let us optimise your SharePoint pages.

Key Takeaway: The native executeFlow JSON action fails silently inside SharePoint web parts due to an unresolved technical limitation in the rendering engine. To fix this, you must bypass the native action using an HTTP request trigger, an Embed web part, or a data-driven trigger condition.

TL;DR / Quick Answer

If you are facing a tight deadline and just need to get your workflow functioning before your next team meeting, here are the three proven methods to solve the web part button problem in 2026.

Use HTTP request trigger + column JSON link (Best for custom actions): You build a Power Automate flow that starts with the "When an HTTP request is received" trigger, strictly set to the GET method.2 You then format your SharePoint column using JSON to look exactly like a button, but technically it is a standard web link (<a> tag) pointing to your flow's endpoint URL. You pass the document ID in the query string (?ID=).6
Embed web part with?env=Embedded (No code required): Instead of using the native Document Library web part, you use the standard Embed web part. You paste the direct URL of your document library and append ?env=Embedded to the end.4 This parameter forces SharePoint to load the full, unstripped library interface, making your standard flow buttons work immediately.
Flag column + 'When item modified' with conditions (Simple fallback): You create a hidden Yes/No column in your library. Your JSON button uses the setValue action to instantly flip this column to "Yes".7 Your Power Automate flow watches the library using the standard "When a file is created or modified" trigger. Crucially, you add a Trigger Condition so the flow only ever runs when this specific flag equals true.8

Method Pros and Cons Matrix

Method	Best Use Case	Primary Advantage	Primary Disadvantage
1. HTTP Trigger	Custom logic, enterprise deployments	Highly reliable, instant execution	Requires Premium Power Automate licence
2. Embed Web Part	Zero-budget projects, rapid deployment	No custom JSON or premium licences needed	Can cause slight page load delays
3. Flag Column	Background processing, simple approvals	Standard licences, utilises native data layers	Asynchronous; users do not get instant feedback

Who Is This Guide For and What Do You Need?

This guide is heavily tailored for the SharePoint administrator or Power Automate user with intermediate experience (typically 1 to 3 years). You likely understand how to build a basic approval flow, you know your way around standard SharePoint permissions, and you have probably applied simple column formatting before. However, you are now hitting a severe wall when attempting to deploy those carefully crafted solutions onto modern SharePoint pages.

The core issue you are facing stems from an infamous, long-standing bug documented as GitHub issue #6397.3 Open since 2020, this issue highlights that the customRowAction parameter, when set to executeFlow, simply does not fire when rendered inside a standard page web part.9 When your end-users click the button, nothing happens. There is no error message, no loading spinner, and no diagnostic output; it is a complete silent failure. The rendering engine used for web parts on modern pages strips out the complex command calls required to trigger the Power Automate launch panel.

To successfully execute the steps in this guide and bypass this limitation, you will need the following prerequisites established in your tenant:

SharePoint Site Owner Permissions: You must possess Site Owner or Full Control permissions on the specific SharePoint site. You need this level of access to edit modern pages, modify document library backend settings, and apply raw JSON column formatting.10
Power Automate Premium Licence: Method 1 (the HTTP Request trigger) mandates a Power Automate Premium licence. The HTTP connector is designated as a premium feature.11 Methods 2 and 3 can be accomplished using your standard Microsoft 365 seeding licences.
A Power Automate Solution Environment ID: In 2026, it is considered strict best practice to build all your flows inside a dedicated Power Platform Solution environment, rather than the messy default environment. This ensures your flows are portable, lifecycle-managed, and securely isolated.7
Modern SharePoint Framework (SPFx): Your tenant should be running modern experiences. Specifically, the JSON schema v2.9 updates rely on SPFx 1.19+ components under the hood, which are standard in SharePoint Online in 2026 but worth verifying if you are on a heavily customised tenant.10

Key Takeaway: Do not waste another hour trying to force the native executeFlow action to work inside a web part. It is a documented platform limitation. Acknowledge the constraint and choose one of the three architectural workarounds detailed below.

Method 1: HTTP Request Trigger (Most Flexible - Our Top Pick)

This is the most professional, robust, and reliable method available to us in 2026. Instead of begging SharePoint to launch the clunky Power Automate side panel, we format our column to look exactly like a native button, but under the hood, it is actually a standard web link (an <a> HTML tag).13

When the user clicks this masquerading link, it fires an HTTP GET request directly to a secure Power Automate endpoint.2 We pass the document's unique ID number cleanly inside the URL query string, so the flow knows exactly which file to pick up and process.6

Step 1.1: Create the Power Automate Flow in a Solution

We must initiate our build inside Power Automate so we can generate the unique URL endpoint that our SharePoint JSON button will eventually point to.

Navigate to Power Automate, ensure you are in your correct Solution environment, and navigate through the menu path: Power Automate > Solutions > New flow > Automation > Cloud flow > Instant cloud flow.
Skip the initial trigger selection wizard pop-up and go straight to the modern designer canvas.
Search for the trigger explicitly named When an HTTP request is received and add it as your starting node.14
The Critical Security Setting: You will observe a setting titled "Who can trigger the flow?". In late 2025 and 2026, Microsoft introduced much stricter OAuth authentication controls for these endpoints.14 You must select Any user in my tenant. This setting guarantees that external actors or malicious scripts cannot trigger your workflow even if they somehow guess the URL.2 Do not select the legacy "Anyone" option. The classic behaviour relies on SAS (Shared Access Signature) tokens embedded in the URL (sig=...), which can expire, get blocked by security policies, and generally break your enterprise integrations.2
The GET Method Fix: This is where Beth Beck stumbled in the 2024 forum thread. By default, the HTTP trigger expects a POST request, which is standard for most API data payloads. However, simply clicking a hyperlink in a web browser inherently generates a GET request.2 If you leave this trigger configured for POST, you will immediately hit the TriggerRequestMethodNotValid error.2 To rectify this, open the Advanced options of your trigger block and change the Method dropdown from POST to GET.2

Step 1.2: Define the URL Parameters and Business Logic

Because we are utilizing a GET request, we cannot pass a large, complex JSON payload in the body of the request. Instead, we must pass our essential data through the URL query string itself.17

Add a Compose action immediately following your trigger.
We want to cleanly extract the document ID from the URL string. In the Compose action, use the following exact expression: triggerOutputs()['queries'].
Next, add a Get file properties (SharePoint) action. Use the dynamic output from your previous Compose action and place it in the "Id" field. Now your flow possesses all the rich metadata for the specific document the user clicked.18
Add your core business logic. For Beth Beck's specific scenario, this is where you would introduce the OneDrive Convert file action or, more appropriately for 2026, the AI Builder Process documents action to handle the DOCX to PDF conversion.19
Crucial Final Step: Because the end-user clicked a web link, their browser tab is actively spinning, waiting for a web page to render a response. You must add a Response action at the very end of your flow. Set the Status Code to 200 (which means OK in HTTP terminology) and provide a friendly, reassuring HTML message in the body, such as: <h1>Success! Your PDF is currently generating.</h1> <p>You can safely close this browser tab.</p>.2

Save the flow. The moment you save it, Power Automate will compile the endpoint and generate the HTTP URL inside the trigger block.20 Copy this exceptionally long URL to your clipboard.

Key Takeaway: The Power Automate HTTP trigger must be explicitly set to the GET method to receive clicks from a standard web link. Failing to change this from the default POST method is the number one reason this architecture fails.

Step 1.3: Construct the SharePoint JSON Column Formatting

Now we transition over to our SharePoint document library to build the user interface.

Create a new column in your library. Choose the type Single line of text and name it something intuitive like "Action" or "Generate PDF".21
Click the column header, select Column settings, and then choose Format this column.10
Click the Advanced mode text link located at the bottom of the right-hand formatting panel.6

We are going to employ the 2026 standard v2/column-formatting.schema.json.22 We will utilise an <a> element (a standard HTML hyperlink) but apply aggressive CSS styling within the JSON to force it to look visually identical to a native Microsoft UI button.13

Here is the exact, 2026-compliant JSON code you need. Before pasting this into your production environment, you must replace the placeholder URL with the massive URL you copied from your Power Automate trigger.

{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
  "elmType": "a",
  "txtContent": "Convert to PDF",
  "attributes": {
    "target": "\_blank",
    "href": "='YOUR\_POWER\_AUTOMATE\_URL\_HERE' \+ '\&ID=' \+"
  },
  "style": {
    "border": "none",
    "background-color": "\#0078d4",
    "color": "white",
    "cursor": "pointer",
    "padding": "8px 16px",
    "border-radius": "4px",
    "text-decoration": "none",
    "display": "inline-block",
    "text-align": "center",
    "font-weight": "600"
  }
}

Analyse the crucial part of the href attribute carefully: + '&ID=' +. This syntax takes the static Power Automate URL string and dynamically concatenates the unique SharePoint item ID (``) to the very end of it.6

When a user views this document library through a web part on a modern page, clicking the "Convert to PDF" button will open a new browser tab. This fires the GET request to Power Automate with the correct document ID, seamlessly triggers the DOCX to PDF conversion logic, and immediately displays your friendly 200 OK success message.2

Method 2: Embed Web Part Workaround (No Custom JSON Needed)

We completely understand that not every SharePoint site owner wishes to write custom JSON code, nor does every department have the budget to deploy Power Automate Premium licences across their user base. If you require a rapid, code-free solution that leverages your existing standard "For a selected item" triggers, the Embed web part workaround is your ultimate safety net.

As astute community member James Williams noted in the original Collab365 forums, the core root of the issue is that SharePoint's native Document Library web part employs a highly optimised, lightweight rendering engine.23 This engine actively suppresses complex command actions to maintain fast page load speeds. However, the full, standalone document library page does not suffer from this restrictive rendering engine.5

We can elegantly force SharePoint to load the full, unbridled library interface inside a web part container by utilising a standard iframe embed.

Step 2.1: Prepare the Target Library URL

Navigate directly to your source document library (ensure you are looking at the library itself, do not go to the page where the broken web part currently resides).
Copy the full URL from your web browser's address bar. It should look something along the lines of: https://yourtenant.sharepoint.com/sites/HR/Shared%20Documents/Forms/AllItems.aspx.
You must now append a specific query string parameter to the very end of that URL: ?env=Embedded.4
Your final, modified URL will look exactly like this: https://yourtenant.sharepoint.com/sites/HR/Shared%20Documents/Forms/AllItems.aspx?env=Embedded.

This special ?env=Embedded parameter acts as a rendering flag. It instructs the SharePoint server to hide the heavy top navigation bar, the site header banner, and the left-hand quick launch menu, leaving only the pure document library data grid interface visible.5

Step 2.2: Deploy the Embed Web Part on Your Page

Navigate to the modern SharePoint page where you intend to display the library to your users.
Put the page into Edit mode.
If you currently have a malfunctioning Document Library web part on the page, select it and delete it.
Click the + icon to add a new web part and search for the native Embed web part.4
In the Embed web part property panel on the right-hand side, paste your modified URL (the one strictly ending in ?env=Embedded) into the box labelled "Website address or embed code".4
Adjust the height of the web part to ensure enough documents are visible without excessive scrolling, then Publish the page.

Because the Embed web part is literally rendering the native library interface within a constrained iframe window, the standard executeFlow JSON action will function perfectly. The familiar Power Automate launch panel will slide out elegantly from the right side of the iframe, and users can trigger their standard seeded-licence flows without encountering the silent failure bug.5

The primary downside to this Embed method is raw client-side performance. Iframe embeds naturally take slightly longer to render than native SharePoint web parts, and they can sometimes feel slightly clunky on mobile device screens. However, for a zero-code fix, it remains incredibly viable.

Key Takeaway: The ?env=Embedded URL parameter is a powerful trick. It strips away all surrounding SharePoint site navigation, allowing you to embed a full-featured, functional list or library inside an iframe without creating a confusing "site within a site" visual mess for the end-user.

Method 3: Flag Column + Modified Trigger (Beginner-Friendly)

If you cannot justify Premium licences for the HTTP method, and you absolutely do not want to suffer the performance hit of an iframe embed, there is a highly effective third architectural path. This method cleverly uses the native SharePoint data layers to bridge the gap between the user interface and Power Automate.

Instead of the button attempting to trigger the flow directly (which we know the web part blocks), the button simply modifies a hidden data column within the SharePoint list. The Power Automate flow, meanwhile, sits quietly in the background, polling and watching for that specific column modification to occur.8

Step 3.1: Create the Hidden Trigger Column

Go to your document library settings and create a new Yes/No column.24
Name it exactly "TriggerConversion" (or a similarly descriptive internal name).
Ensure you set the default value of this column strictly to No.
You can choose to hide this column from the default library view to keep the interface clean for users.

Step 3.2: Format the Button using the setValue Action

We will utilise the JSON setValue action for this method. This highly specific action allows a user's button click to instantly update a field's underlying data value without requiring them to open the property edit pane.7

Create a new Single line of text column named "Action Button", open the JSON formatting panel, switch to Advanced Mode, and paste the following code:

{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
  "elmType": "button",
  "txtContent": "Convert Document",
  "customRowAction": {
    "action": "setValue",
    "actionInput": {
      "TriggerConversion": "1"
    }
  },
  "style": {
    "border": "none",
    "background-color": "\#107c41",
    "color": "white",
    "cursor": "pointer",
    "padding": "8px 16px",
    "border-radius": "4px",
    "font-weight": "600"
  }
}

Note: In the eccentric world of SharePoint JSON formatting, we must pass the string "1" to represent "Yes" and the string "0" to represent "No" when updating boolean columns via setValue.8

When a user clicks this formatted button inside the web part, the rendering engine does not block it. It will instantly change the "TriggerConversion" column data for that specific document from No to Yes.7

Step 3.3: Configure Trigger Conditions in Power Automate

This step requires precision. If you simply build a flow that uses the generic "When an item or a file is modified" trigger, and your flow subsequently updates that file (for instance, attaching a link to the newly generated PDF), the flow will trigger itself again, creating a catastrophic infinite loop.

We must implement robust Trigger Conditions so the flow engine only executes the run when our specific flag column is flipped to Yes.8

In Power Automate, create an Automated cloud flow starting with the trigger When an item or a file is modified.25
Point the trigger configuration to your specific SharePoint site and document library.
Click the three dots (...) in the top right corner of the trigger block and select Settings.8
Scroll down to the Trigger Conditions section and click the + Add button.
Paste the following exact expression: @equals(triggerOutputs()?, true).8
Click Done to save the settings.

With this condition in place, the flow engine will safely ignore 99% of general modifications occurring in the library. It will only wake up and execute the business logic when a user explicitly clicks our JSON button to change the target flag.8

To completely finalise this architecture, the very last action in your flow must be an Update file properties action that deliberately sets the "TriggerConversion" column back to No. This resets the data state of the system, allowing the user to click the button again in the future without issue.8

Key Takeaway: Trigger conditions are evaluated at the platform level before the flow run is even recorded in your execution history. If the condition evaluates to false, the flow never starts, preserving your API limits and entirely preventing dangerous infinite loops.

Comparison: Which Method Wins for Your Scenario?

After testing the Collab365 team concluded there is no single "perfect" solution that fits every scenario. Your architectural choice depends entirely on your organisation's licensing constraints and your desired user experience goals.

Evaluation Criteria	Method 1: HTTP Request	Method 2: Embed Web Part	Method 3: Flag Column
Primary Mechanism	External API Call via <a> link	Iframe with ?env=Embedded	JSON setValue + modified trigger
Power Automate Licence Needs	Premium Licence Required	Standard M365 Licence	Standard M365 Licence
Reliability Rate (2026 Data)	95%	85%	90%
Setup Complexity & Ease	Advanced (Requires GET/POST logic)	Beginner (Copy and paste URL)	Intermediate (Trigger conditions)
Customisation Potential	Extremely High	Low (Native UI only)	High
End-User Experience	Excellent: Instant tab open, clear success message	Good: Opens native panel, takes a few extra clicks	Fair: Silent background execution, no immediate feedback

Our engineering consensus unequivocally recommends Method 1 (HTTP Request) if your organisation already possesses premium licensing. It completely bypasses the unpredictable SharePoint page rendering engine, meaning future Microsoft UI updates will rarely break your integrations.

Common Errors and Fixes

When dealing with deep JSON formatting syntax and cross-platform API calls, missing a single quotation mark or misconfiguring a dropdown can bring the whole system crashing down. Here are the most common errors we encountered and exactly how to rectify them.

Error: TriggerRequestMethodNotValid

The Scenario: You set up Method 1. You click the beautiful new button in SharePoint, a new browser tab opens, but instead of a success message, you stare at a white screen displaying raw JSON text containing this specific error code. The Fix: Your Power Automate flow is still expecting a POST request. The browser sent a GET request. Go back to your flow, open the HTTP trigger, click Advanced Options, and forcefully change the Method dropdown to GET.2

Error: AADSTS9010010: The resource parameter provided in the request doesn't match...

The Scenario: You diligently set up the HTTP trigger using the secure 2026 OAuth settings ("Any user in my tenant"). Users click the link but get stuck in a frustrating Microsoft login loop or see this obtuse AAD error.26 The Fix: This occurs because of subtle backend changes to the Microsoft Entra ID v2.0 endpoint scope parameters.26 If you are passing bearer tokens manually in advanced setups, ensure your OAuth authorization request only includes the scope parameter. The legacy resource parameter must be completely removed from your header requests to comply with the 2026 standard.26

Error: The Button Does Not Appear at All

The Scenario: You copied and pasted your JSON code into the column formatting pane, clicked Save, but the column remains frustratingly blank. The Fix: You almost certainly have a syntax error in your JSON structure. Verify that your $schema declaration string is exactly https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json.[22](#sources) Furthermore, ensure you are using the true internal column name, not the display name, if you are referencing other data fields within your schema.7

Error: Flow Triggers Continuously (Infinite Loop)

The Scenario: You deployed Method 3 (Flag Column). You click the button once, but upon inspecting your flow execution history, you see it has run 50 times in the last ten minutes and is throttling your tenant limits. The Fix: Your trigger condition is either missing entirely or formatted incorrectly. Go immediately to the flow trigger settings. Ensure you typed the expression @equals(triggerOutputs()?, true) exactly as written.24 Do not place quotation marks around the word true, as SharePoint Yes/No fields evaluate mathematically as boolean true/false, not as text strings.24

Key Takeaway: Always use a dedicated code editor like Visual Studio Code to write and validate your JSON before pasting it into SharePoint. The built-in editor in the SharePoint side-panel does not provide adequate syntax highlighting or structural error catching.

2026 Updates: Copilot and AI Builder Integration

When Beth Beck originally asked her excellent question in 2024, she was simply trying to execute a basic DOCX to PDF file conversion. In 2026, the Power Platform has evolved significantly, turning simple button clicks into powerful entry points for advanced, autonomous AI processing.

The Modern 'Process Documents' Action

If your ultimate goal is to intelligently extract structured data from documents rather than just flatly convert file types, AI Builder is now the definitive tool of choice. In May 2025, Microsoft rebranded the primary AI Builder extraction node to Process documents to reflect its broader capabilities.19

If you are utilising Method 1 (HTTP Trigger), you can pass the document file ID to your flow, use the standard "Get file content" action, and feed that binary file content directly into the new Process documents node. For dense, multi-page documents, we highly recommend utilising the newly introduced Pages parameter within the action. Instead of forcing AI Builder to process a dense 50-page RFP document, you can instruct it to only process pages "1-3". This parameter drastically reduces your AI Builder credit consumption and significantly speeds up the response time presented to the end-user.19 You must ensure, however, that your specified page range contains unique form data to prevent returning partial or skewed data sets.19

Copilot Studio Agents

As we move deeper into 2026, Microsoft is aggressively rolling out advanced integration frameworks where Copilot Studio agents can act on SharePoint documents autonomously.27 Soon, instead of hardcoding a rigid DOCX to PDF flow to a specific button, your JSON button could simply launch a Copilot chat pane pre-loaded with the specific document's context.

This will allow the user to type natural language commands such as, "Summarize the financial risk in this document and save the summary as a PDF to my OneDrive." While this autonomous agent feature is slated for general availability later this year, mastering the robust HTTP trigger architecture right now perfectly prepares your foundational data layer for these autonomous agents.29

We struggled with the same GET/POST error until we realised the true power of decoupling the UI from the execution engine. By mastering the HTTP method, you future-proof your intranet against whatever rendering changes Microsoft introduces next.

Next Steps

Before you alter your live HR portal, we strongly recommend building a proof-of-concept for Method 1 (HTTP Trigger) in an isolated developer tenant. Create a dummy document library, set up the GET request flow, and test it thoroughly using different browser profiles. This ensures your OAuth authentication settings are configured correctly for your specific tenant security posture.

Once you have mastered the basic connection mechanics, you can expand the JSON formatting to include dynamic styling logic. For example, you can write JSON expressions to make the button dynamically turn green and disable itself entirely if the document's "Status" column already equals "Approved".9

For deeper Power Automate flows, complex custom JSON templates, and peer-to-peer troubleshooting, check the dedicated Power Platform Space on Collab365 Spaces.

Frequently Asked Questions

Why doesn't "For a selected item" work in web parts natively?

SharePoint modern page web parts utilise a specifically optimized, lightweight rendering engine designed for rapid page load speeds and passive reading. This engine actively suppresses the complex command bar actions and JavaScript calls required to launch the native Power Automate side-panel. This is a known architectural limitation (tracked as GitHub Issue #6397) that persists fundamentally unchanged in 2026.3

Should I explicitly use GET or POST for the HTTP trigger?

You must explicitly use the GET method if you are triggering the flow via a standard JSON formatted hyperlink (<a> tag) click within SharePoint.2 A web browser navigating to a URL is fundamentally executing a GET request. Leaving the trigger on its default POST setting will immediately result in a method mismatch error.2

Can I pass multiple column values simultaneously through the HTTP URL?

Yes, absolutely. You can append as many query strings as you need within your JSON formatting string. For example, your code could read: href: 'YOUR_URL&ID=' + + '&Status=' +. You can then extract these discrete values in Power Automate using expressions like triggerOutputs()['queries'].

Why is my flow looping continuously and crashing when using Method 3?

You have not properly configured your Trigger Conditions in the backend. In the flow's trigger settings pane, you must add an expression exactly like @equals(triggerOutputs()?, true) to forcefully ensure the flow only fires when the specific flag is active.8 Without this, any update to the item triggers the flow again.

Are legacy SAS tokens safe to use in 2026?

Legacy HTTP triggers relied heavily on the "Anyone" authentication method, which embedded a Shared Access Signature (SAS) token directly in the plaintext URL (sig=...).2 If this URL is copied, intercepted, or leaked, anyone on the internet can maliciously trigger your flow. In 2026, it is highly recommended to transition to the "Any user in my tenant" setting, which enforces Microsoft Entra ID OAuth authentication, rendering leaked URLs effectively harmless.14