Where can I find a proper manual on how to activate and use mindmanager in MS teams?
If your organization allows 3rd party applications you can click on "Apps" and search for MindManager to add it to a team. If your organization is more restrictive, then your Microsoft 365 admin will need to first approve and enable the app before you'll be able to find it in the apps list.
A Microsoft 365 admin can also install it as a custom application, for instructions on that method see: https://download.mindjet.com/help/MindManager_Teams_App_Admin_Installation_EN.pdf
Let me know if that helps!
Thank you I will have a go at it.