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Outlook actionable messages (adaptive cards) and delegated access for another users inbox

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Posted on by 4

Hello everyone,

 

I've been utilizing actionable messages along with the action.http function to efficiently query permissions and other pertinent data. While this setup works seamlessly when the intended recipient directly responds to the message, I've encountered an issue when someone with delegated access to an Outlook mailbox attempts to respond.

 

The problem arises when a delegated user responds to an actionable message. In such cases, the following error message is displayed: "Failed to validate the signature of the actionable message card." Upon inspection, I found that my card includes a header with an empty authorization token.

 

Here are my specific questions:

  1. Feasibility of Delegated Access: Is it possible for a person with delegated access to execute an actionable message using action.http directly within another user's mailbox?

  2. Forwarding Actionable Messages: If direct execution isn't possible, is it feasible to forward an email containing actionable messages to another person? I've attempted this, but the forwarded email appears to be empty, lacking both header and body content.

  3. Actionable Messages Forwarded to New Recipients: Assuming forwarding is possible, can the new recipient execute the actionable message?

I came across an article by Rik De Koning that stated, "Actionable Messages are not bound to the person that the message is sent to. This person can forward the message to any other person who can then respond to it, even though they were not the original recipient." Unfortunately, I haven't had the opportunity to discuss this further with Rik.

 

I'm eager to find a solution or workaround to address these challenges. Any insights or suggestions would be greatly appreciated.

 

Best regards

Marcus

  • PowerSchmiede Profile Picture
    PowerSchmiede 4 on at
    Re: Outlook actionable messages (adaptive cards) and delegated access for another users inbox

    I've never received an answer, but two weeks ago I found a workaround.

    The following link (Collect information from external stakeholders using Adaptive Cards and Power Automate flows – terhoantila.com) describes how you can use an adaptive card in an HTTP response. My idea is to include a fallback link in the emails with actionable messages. If the adaptive card is not working (i.e., someone opens the message in iOS Mail or someone forwards an email with the adaptive card and the card get lost), the user can click the link and get the same adaptive card on a webpage.

    I haven't had time to test it yet, but I think it will work.

    I hope this helps you.

  • arielros Profile Picture
    arielros 8 on at
    Re: Outlook actionable messages (adaptive cards) and delegated access for another users inbox

    Did you ever get a firm answer on this? 

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