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Azélie
New Member

“Message text mention needs to be specified” on the action “Post a message in a chat or a channel” (Power Automate / Teams)

Hello

I ask for your help for an error on a particular action on Teams.

I have a Power Automate flow, which post particular messages on several channels. But on one of these channels I have an error, with the following message : “Message text mention needs to be specified”. What are the possible reasons of this message ?

Erreur-constatée.JPG

I have verified the account used for the execution of this flow. He can write properly on this channel manually. He can send a small message to this channel with the action “Post a message in a chat or a channel”.

But the message, which is prepared in my flow and sent with this action, is a long message written in HTML.

Action-réduite.png

In this case it mentions an user with <at> tag. Is there a limit for the email written between <at> and </at>? How many characters could contain this email?

Thank you very much for your help

Nicole

3 REPLIES 3
Azélie
New Member

Hello,

In my flow the user was mentioned with his email and the <at> tag. And there was an error when the email of the user is very long (42 characters). I thought this email could not be interpreted.

So I get the User ID (Microsoft 365) with the “Get User Profile” action. I mention the user with his User ID between <at> and </at>. There is no more error on my flow

Best Regards

Nicole

I got the same error when I used Channel email address between <at></at> tags. The length of the email is 36 char and I got the email id using the 3 dots on channel and using option "Get email address" 

I also tried getting User Profile using the same email id but that does not work either. How can I solve this?

ndawoodani_0-1700508277614.png

 

Me too! Before I found this post, I had the same error, then applied the solution as suggested by @Azélie, it worked at the beginning for a while like for all new posts ever since the fix. Until recently, the same kinda post returns the same error message back to square one. I have a feeling this happened right after the recent Power Automate update from Microsoft at the new designer where the pane to edit the flow appears on the left side of the cards. Any thoughts?

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