How to create a Microsoft Teams connection using an Application User

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Posted on by Mathias Langlet

Hello,

In order to account for the deprecation of Teams Office365 connectors announced by Microsoft, we need to migrate to Power Automate workflows to send our Azure alerts to our ChatOps channel in teams.

However, when creating such a flow the messages are posted using my user. When I try to create a new Microsoft Teams connection there is no option to select my Application User that I created in my Power Automate environment. I'm prompted to log in as a user, but I don't have any credentials of the service principal I created to run my flow. I want to change this so that the Microsoft Teams connection used by the flow is owned by my Application User that owns and runs the flow. Is this possible? If not, what can I do to run my Microsoft teams connection using a system account?

Thanks,

Mathias

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Building flows

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trice602 15,402 Super User 2025 Season 2 on at

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Hi,

If I understand correctly, you can use the Post message action and click on the "..." in the settings and change the connection string to your service account.

Then post messages as Flow bot, post in Chat with Flow bot, shown below.

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⭐ If this was helpful, please like and/or mark as a verified answer to help others find this too!

Always glad to help! 💯💯💯💯💯

Tom

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Mathias Langlet 13 on at

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Thanks for the reply.

To clarify, I need to use the "Post card in a chat or channel", to send an adaptive card to our ChatOps channel.

When you say "change connection string", do you mean change the connection reference used? If yes, then that doesn't seem to be an option as I must then create a new connection which requires user credentials.

I'm just trying to understand if I need to allocate a system account with an o365 license with access rights for teams to establish such as connection reference of if there is some way to create one that is run using the power automate service account.

Thanks,

Mathias

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trice602 15,402 Super User 2025 Season 2 on at

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Hey there!

I am following up on this post how to create a microsoft teams connection using an application user in this category building flows from 08/16/2024. I know the post is a little older, but it is a common question here so wanted to take a moment and follow-up. I see there have been 2 replies and 2 likes and asking if your question has been answered. If so, please help the community out by completing one or more of the following actions! Thanks in advance!

Easy as 1-2-3 ‼️💯⭐😎🆒🙏

1) Mark a reply as a verified answer - this is essential, and it helps others with the same general question find this thread. ✅

2) You can also mark one of more replies as a verified answer. Please take a moment and give the author credit for volunteering their time. ✌️

3) Like one or more replies. Kudos always greatly appreciated! 👍

Pro tip: if you found your own solution or workaround, feel free to add a reply to your own post and mark it as the solution too! The goal is to get this thread marked with a verified answer by anyone that finds one or more replies helpful!

Again, thanks in advance for reading and responding, always glad to help! Tom 💯💯💯💯💯

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trice602 15,402 Super User 2025 Season 2 on at

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If I can help with anything else please let me know or tag me in a future post, I enjoy reading and answering questions. Always glad to help! Tom 💯💯💯💯💯

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CU01041552-0 4 on at

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@trice602 I don't believe you answered @Mathias Langlet's question(s) from 19 Aug 2024 at 00:43:46.

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MC-05091305-0 4 on at

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I have the same question. As far as I can tell, the MIcrosoft Teams connector does not allow for connection using a service principal. However, it appears that you can use the HTTP with Microsoft Entra connector to connect to Microsoft Graph. I'm still trying to understand the details as I've never done this kind of thing before but hopefully puts you on the right track.

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