Forum Discussion
Other Products depend on this license (Dependency Violations) Office 365 Licensing
There is no such list unfortunately, closes you can get is this article: https://docs.microsoft.com/en-us/azure/active-directory/active-directory-licensing-product-and-service-plan-reference
Best advice I can give you is start small, then toggle them one by one. Some dependencies are pretty obvious, such as Office Online depending on SPO, Exchange Analytics and Threat intelligence depending on Exchange Online, etc. Others are not so obvious, such as Bookings depending on Exchange (well it's obvious if you know how it works behind the curtain, but...).
The licenses is assigned more than one week ago. As a requirement for Booking, do I need an Exchange Online Mailbox? When I click on the link I got an error message "We could not find a Mailbox for this recipient".
Yes, you do need an ExO mailbox.
I had the same problem and the names listed were not members of any other licenses or groups.
In the end I removed the people from the group which had errors.
Waited half an hour, then re-added them back into the same group again, which resolved the problem.
