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Failed to validate the signature of the actionable message card Power Automate

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Posted on by Community Power Pla... Microsoft Employee

Power Automate approval flow suddenly having error "Failed to validate the signature of the actionable message card." when click button through email. Approval flow still can be proceed through Microsoft Teams.

Kindly share advice.

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pioter 11 on at

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The same problem, it worked until the 23rd, from today all users in the company have the same error approving the pass through outlook
Arrojado 15 on at

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Same issue here. 😞
Jorn75 4 on at

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Same here 😪
M_Admin 6 on at

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I appear to have user(s) seeing the same. Failing from Outlook with the error and approving from Teams.
Techsticle 2 on at

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We are also seeing this in our organization. So far tested, Outlook for Mac, and Outlook for iOS has the issue. Outlook web does not. Microsoft Support replied that "it looks like the issue if from the server side. You will have to contact IT admin of your organization, who manage your account. They would be able to rectify the issue and help you on this". I will see if our IT is seeing anything from their end...

I let Microsoft Support know about other organizations having this issue today, as well
M_Admin 6 on at

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So, at least in my case, I am speaking about Power Automate via Microsoft 365, thus there is not a "Server" to look at, it i a service provided in 365.
ChadH 13 on at

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I just want to say my organization is experiencing the same issue.

We have multiple flows which send requests for approval to individuals. They can respond via teams but not via the buttons in the email.
Community Power Pla... Microsoft Employee on at

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Microsoft, please address this. It’s clearly not an individual tenant issue.
sarita1980 8 on at

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We have the same issue. could you please update here if it is solved.
Adowda 2 on at

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I just wanted to add onto to this, that our organization is also experiencing this issue.

We also can respond via teams but not via the buttons in the email.