Dear @Hendriks, Dimitri,
Based on your description, it seems that you and your team are currently unable to use the "Share Channel" feature within Shared Channels in Microsoft Teams.
We have attempted to replicate this unexpected behavior in our test environment, but the functionality is working as expected. At present, there are no known incidents or service disruptions related to this behavior. This unexpected behavior requires a backend-level investigation that exceeds the access permissions of Microsoft Q&A moderators. A Microsoft technical support engineer will need to review your Teams configuration, run diagnostics to identify the issue, and, if necessary, escalate the case to a specialized team for advanced log analysis.
To submit a new service request to Microsoft Support, you will need to:
- Go to the Microsoft admin center. If you get a message that says you don't have permission to access this page or perform this action, you aren't an admin. For more information, see Who has admin permissions in my business? or you can contact directly to IT admin of the university.
- On the bottom right side of the page, select Help & support.
- Type a question or keyword into the text box. If you get a drop-down list, select the one closest to your question, or continue typing your question, then press Enter.
- If the results don't help, at the bottom, select Contact Support.
- Enter a description of your issue, confirm your contact number and email address, select your preferred contact method, and then select Contact me. The expected wait time is indicated in the Contact support pane.
Hope you will understand for us about this situation.
Thank you for your patience and understanding.
If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.