Failed to validate the signature of the actionable message card.

[jaina]

Hi Experts,

Kindly help, one of the approvers has encounter this error for the first time and I don't know how to fix it? Can somebody explain the root cause why such error persist? and how to resolve this?

[oana_manole]

Same problem here. I can't find a solution

[VishalS]

I am facing the same issue from yesterday. Solution that was working prior to yesterday is not working now. 

[SirNadon]

What was the prior solution that fixed it, I would like to try that and see if it works for us?

[pioter]

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

[VishalS]

Sorry if I sounded wrong. I meant that the same solution was working prior to yesterday which is failing now. No change has been done in the solution. 

[SirNadon]

 I did see this in my system today, wonder if this is related. Looks to be from what I can see. What are your guys thoughts?

Based on customer feedback we’re taking some time to improve the content of the Briefing emails from Microsoft Viva to be more personalized for each recipient. We will pause sending these emails in early 2023 and will share an updated Briefing email roadmap later in 2023. When this will happen: The pausing of the email service will roll out to end users no earlier than January 15th 2023 and will be done by February 1st, 2023 How this affects your organization: The result of this change is end users within your organization will no longer receive the daily briefing email from Microsoft Viva. Users who rely on the daily briefing email functionality like meeting prep and outstanding task reminders, booking focus time, and recommendations to improve work patterns can instead visit the Viva Insights Outlook add-in or the Viva Insights app in Teams and web. What you need to do to prepare: ·     For information on the Briefing email and the functionality that will be paused for your end users please see Briefing email overview | Microsoft Learn ·     For information on the Viva Insights application in Teams and on the web – which includes functionality like outstanding task reminders, booking focus time, and recommendations to improve work patterns - please see: Viva Insights app | Microsoft Learn ·     Review and assess the impact on your organization and end-users

[KimHFH2022]

I am having the same error when trying to allow a new employee access to company SharePoint sites. When they request access, I receive an email with Approve or Decline buttons. It has always worked up until today and now I cannot approve their request to access the site by clicking the Approve button in the email. I can of course just give them access via SharePoint settings. I just thought this was weird as I've never seen this error before.

[jaina]

saw this photo from one of the thread i read... 

link: https://powerusers.microsoft.com/t5/Using-Flows/Failed-to-validate-the-signature-of-the-actionable-m...

[SirNadon]

Thanks for the update and showing that it is a Global issue, sad part is it would be nice if they sent out a notice of some sort to the Admin of O365 so we knew to let end users know. But it is what it is. 

[VishalS]

The issue seems to be resolved now. At least for me. We got our solution working again.

[SirNadon]

I have confirmation from users as well that it is working as well.