Invalid Connection/Test Connection Failed when using Send an Email V2

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Posted on by CarlHRVA

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Hello,

I'm experiencing some very strange behavior when trying to configure any "Send an Email (V2)" action in my flow. These were not previously giving me any trouble but suddenly started throwing the error. I had 15 or so of these email actions configured and saved with no issue but suddenly all 15 of them are returning "Test Connection Failed" errors and if I click the ellipsis and view my connections they all have a red exclamation point and say "Invalid Connection". All other connections for all other actions have no issues. Any help would be greatly appreciated!

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Building flows

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ScottShearer 25,268 Most Valuable Professional on at

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Re: Invalid Connection/Test Connection Failed when using Send an Email V2

@CarlHRVA

Try repairing the connection being used for the send an email action - I suspect that this will remedy the issue for you. It has been my experience that connections sometimes just fail for no apparent reason and must be repaired.

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CarlHRVA 601 on at

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Re: Invalid Connection/Test Connection Failed when using Send an Email V2

@ScottShearer hmmmm no luck. I tried signing out and signing back and it just immediately goes back to "Test Connection Failed" and "Invalid Connection" once I am reconnected. I thought it may have to do with the values I was using in the "To" fields but even if I delete the existing action and add a new one the "Test Connection Failed" error appears before I enter anything into any of the fields.

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CarlHRVA 601 on at

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Re: Invalid Connection/Test Connection Failed when using Send an Email V2

@ScottShearer if I sign in with a different O365 account for my company rather than the client(in the same flow), the error disappears....

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RobElliott 10,313 Super User 2025 Season 2 on at

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Re: Invalid Connection/Test Connection Failed when using Send an Email V2

I had this happening regularly 2 years ago after an Office 365 password change. Eventually I solved it by going into the Connections list in both Power Automate AND Power Apps, selecting Switch Account for those that had failed and selecting the account again. It didn't work when I just did this in Power Automate (or Flow as it was then), but once I also did it in Power Apps it solved the problem. It took Microsoft by surprise as well. It might be worth giving it a go.

Rob
Los Gallardos
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CarlHRVA 601 on at

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Re: Invalid Connection/Test Connection Failed when using Send an Email V2

@RobElliott This did it! I changed my password today. Once I switched accounts for the connections in PowerApps and signed out and signed back into the one that had failed in Power Automate (Flow?), the connection is valid again. Thank you both so much!

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CarlHRVA 601 on at

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Re: Invalid Connection/Test Connection Failed when using Send an Email V2

@RobElliott I'm having this issue happen with regularity and it seems to be completely random when it decides to start working again. This is extremely frustrating and time consuming and causing significant delays. Any insight into what may be causing this? Tried with different accounts, different computers, deleting the connections and re-establishing and even recreated the entire flow and all 15 e-mails and all of their dynamic content because I couldn't save the flow to export it as a zip. Pulling my hair out over this and any help would be greatly appreciated.

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