For the various Reports in Admin Center, especially the Usage Report, please include Co-Organizers in the data. Or provide a Co-Organizer report. GTM Support has confirmed that the reports do not account for Co-Organizers.
We have several licensed users that show as not having any meetings in the reports. Thus, it looks like they don't use the account. The reality is that administrative assistants are scheduling the GTM meetings in their own account and setting these other GTM licensed users as Co-Organizers. More accurate reporting would be very useful to us.