Hello,
We have recently bought licence teamviewer. We have created Administrator user on dedicated web portal teamviewer. We have create token like mentioned on your Web documentation. We have Active Directory Server with different group. We download and setup Teamviewer AD Connector with token created before. When I try to launch synchronization we have an error indicate : "Unable to determine token account information. Please check API token permisions." And users members of Group Active Directory authorized to synchronize don't appear on web portal Teamviewer.

For your information, we have correctly setup permissions for API like to documentation.
PS : We attached screenshot of log generated by TeamViewer AD Connector