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MS Project tasks in Microsoft Teams
Distributing and updating a MS Project schedule is time-consuming As a project manager, you work with Microsoft Project...
When using the Windows Desktop App from Microsoft Teams, the message There was a problem reaching this app appears when accessing a list. The error occurs in the rules when accessing Microsoft Lists via the Microsoft Teams Task App.

Access via the underlying SharePoint list continues to work independently of this via the Teams web app, the Microsoft SharePoint web interface and the Microsoft Lists desktop app. Access via the Microsoft Lists mobile apps, etc. also continues to work.
Until Microsoft offers a solution for this, the following method will help:

Exit the Microsoft Teams desktop app.

Open Windows Explorer and enter %AppData%\Microsoft in the address bar and press Enter.

Delete the Teams folder in the folder.

Start the Microsoft Teams desktop app.
Access to the list via the Teams desktop app will then work again.
3 min read
Apr 11, 2026 Renke Holert
Distributing and updating a MS Project schedule is time-consuming As a project manager, you work with Microsoft Project...
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Feb 24, 2025 Renke Holert
For project managers who have been managing their projects with Microsoft Excel, Microsoft now offers a very simple...
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Jan 21, 2025 Renke Holert
Error in Microsoft Teams Whenusingthe Windows Desktop App from Microsoft Teams, themessageThere was a problem...