With this neat little technique you can identify the user who invoked a flow from a Power App irrespective of the account that actually runs the flow

Flow User

identifying the user

The user’s name, email or GUID can be identified and captured, and it’s as simple as initialising a string variable and setting its value to one of the following

triggerOutputs()[‘headers’][‘x-ms-user-name’]

triggerOutputs()[‘headers’][‘x-ms-user-email’]

triggerOutputs()[‘headers’][‘x-ms-user-id’]

Nice and simple!

A couple of items to bear in mind:

It only works at the top level, ie the flow directly invoked from a Power App.  It won’t work for a child flow.  In reality that’s not a problem, simply capture the data in the first flow and pass to child flows as a variable

The GUID returned is the user’s GUID in Active Directory, not the GUID for the user’s record in the User table for the current environment, which is different


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