Mail Tips Action Fails Bad Authorization Token

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Posted on by David_MA

15,629 Super User 2026 Season 2

A few weeks ago, one of my flows with a Mail Tips action failed with the following error:

Error from token exchange: Bad Key authorization token. Token must be a valid JWT signed with HS256 Failed to validate token: IDXxxxxx9: XxxxSecurityKey validation failed. The associated certificate has expired. ValidTo (UTC): '4/5/2024 11:59:59 PM', Current time (UTC): '4/24/2024 9:36:35 PM'.

I tried changing the connection reference, which didn't work. To fix the issue, I had to recreate the workflow over. Now it is happening again on the new workflow.

Does anyone know the cause of this problem and how to permanently resolve the issue? I don't want to have to keep recreating the workflow every couple of weeks.

I wonder if this is related to the issue: Validate an Outlook add-in identity token - Office Add-ins | Microsoft Learn. It started happening the same time this was posted on April 9.

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Andy_Moyer 29 on at

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Any luck with figuring out what can be done to proactively prevent this from reaching the token expiration?

Thanks,

Andy
David_MA 15,629 Super User 2026 Season 2 on at

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@Andy_Moyer unfortunately no. I found this: Azure App Expiry Monitoring with Power Automate & Graph API - DamoBird365. It requires that you have admin permissions to implement, which I do not have, and is not something our admins wanted to pursue.

If this is something you have and can set it up and it works, let me know and I will mark your response as the answer to this post. Or if someone else can confirm this post, let me know and I will mark your response as the answer.