Unable to add a Power App as Teams tab (Critical!)

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Posted on by VilPel

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Hello community,

Just a couple of days ago, I started facing this issue in my tenant when trying to add a Power App as a Teams channel tab in Teams.

"This app does not exist, or you do not have access to it. Please contact an administrator."

I am the global admin so it's not a permission issue. This happens across all teams, channels, users and apps in our tenant. We have seen the same thing happening in other tenants too.

These are Power Apps created from the maker portal () and added to Teams. No issues in the past, this started happening all of a sudden.

Has anybody else faced the same issue?

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Building Power Apps

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MV-23101239-0 4 on at

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We have exact the same issue. Starting the same period in October.

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mmbr1606 14,615 Super User 2026 Season 1 on at

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hey

have u tried to use the website option when adding new tab and insert the url of the powerapp there?

if it helped please mark as verified answer

cheers

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PB-21100718-0 8 on at

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There must have been a change from Microsoft in the last hour. The error is no longer present in our system. The app works again without having changed anything. Please check this for yourself.

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