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Regular Visitor

Error Approval request Failed to validate the signature



One user have a problem when he wants to approve/decline Approval request. Approval request is coming from Power Automate flow, and both on his phone and laptop he gets this error: Failed to validate the signature of the actionable message card.



He didn't have this problem until couple of days ago. Can you help me with this issue?

New Member

We are also seeing this within Outlook on the web. The user is using the One Outlook Preview.

Frequent Visitor

same issue here, it is happening not for all users, just for some.

New Member

Any update on this issue? One of my users just starting experiencing this today. 

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