Why Your Power Automate Flow Fails Without Telling You Why
A quick way to actually see what went wrong, instead of guessing.
By Shehryar Hassan, Microsoft 365 & Azure Consultant
If you have ever built a Power Automate flow that just stops working one day, with no error in your inbox and nothing obviously changed, you are not alone. I hear this more than almost anything else with Power Automate: "the flow says it is on, but nothing is happening."
The problem is usually not the flow logic. It is that a step failed quietly, and Power Automate does not always tell you.
Check the run history first, not the flow
Open the flow and go to Run History, not the overview page. A lot of people see the flow is turned on and assume that means it is working. It does not. The overview page tells you the flow exists and is enabled, not that its last ten runs succeeded.
Click into a failed run and expand each step. Somewhere in there is usually a specific error, and it is often something mundane: a SharePoint column got renamed, a file got moved to a different folder, or a connection, especially an Outlook or SharePoint one, expired and needs re-authorizing.
Turn on failure notifications
By default, Power Automate does not email you when a flow fails. You have to add that yourself. The easiest way is a separate flow: trigger on "When a flow run fails" (there is a template for this), and send yourself an email or a Teams message with the flow name and the error. It takes five minutes to set up, and it means you find out the same day instead of three weeks later when someone asks why an approval never went through.
Watch your connections
Connections tied to one person's account, yours most likely, can break silently if that person changes their password, loses access to a mailbox, or their account gets flagged by conditional access. If several flows break at the same time, check whether they share a connection before you start debugging each one on its own.
A good habit
Once a month, open My Flows, sort by status, and skim for anything showing errors. It takes two minutes and catches problems long before someone notices a process just quietly stopped happening.
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