Hello Jim,
If I understand correctly, you are not able to pin a post in a private channel in the New Teams.
The issue you are experiencing happens to be a known issue affecting some users of the new Microsoft Teams.
However, you can confirm that the member permissions are correctly set to allow pinning of posts.
To check permissions, take the following steps if you are an owner on the Teams.
- Sign in as an owner of the Team.
- Right-click the affected private channel and select “Manage Channel”.
- Go to the “Settings” tab, and expand “Member Permissions”.
Toggle the “Allow members to create, update, and remove tabs” control on.
Though I have tried on my end and I couldn't pin my post. So, I don't think this is not available on the new Teams yet.
It could be due to ongoing updates or issues with the new Microsoft Teams, as it’s still being improved.
However, you can submit feedback to Microsoft Teams development team on this.
Kind Regards,
Rita.