web
You’re offline. This is a read only version of the page.
close
Skip to main content

Announcements

News and Announcements icon
Community site session details

Community site session details

Session Id :
Power Platform Community / Forums / Power Automate / Failed to validate the...
Power Automate
Answered

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

(0) ShareShare
ReportReport
Posted on by 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. Error.png

Categories:
I have the same question (0)
  • pioter Profile Picture
    11 on at

    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 Profile Picture
    15 on at

    Same issue here. 😞

  • Jorn75 Profile Picture
    4 on at

    Same here 😪

  • M_Admin Profile Picture
    6 on at

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

  • Techsticle Profile Picture
    2 on at

    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 Profile Picture
    6 on at

    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 Profile Picture
    13 on at

    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 Platform Member Profile Picture
    Microsoft Employee on at

    Microsoft, please address this. It’s clearly not an individual tenant issue.

  • sarita1980 Profile Picture
    8 on at

    We have the same issue. could you please update here if it is solved. 

  • Adowda Profile Picture
    2 on at

    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. 

Under review

Thank you for your reply! To ensure a great experience for everyone, your content is awaiting approval by our Community Managers. Please check back later.

Helpful resources

Quick Links

Introducing the 2026 Season 1 community Super Users

Congratulations to our 2026 Super Users!

Kudos to our 2025 Community Spotlight Honorees

Congratulations to our 2025 community superstars!

Leaderboard > Power Automate

#1
Haque Profile Picture

Haque 304

#2
David_MA Profile Picture

David_MA 245 Super User 2026 Season 1

#3
Expiscornovus Profile Picture

Expiscornovus 243 Most Valuable Professional

Last 30 days Overall leaderboard