Usage reports in O365 Admin Portal don't accurately account for all users
The Usage reports in O365 don't accurately account for all licensed users if an O365 app is used without the individual component license enabled (e.g., users who access SPO without an SPO license)
BACKGROUND: We discovered when we first started using our O365 E3 tenant that an SPO license was not required to access SPO.
Since SPO license is tied to One Drive, and Security has not finished piloting OneDrive, we allow users to access SPO via their SPO permissions, without an SPO license component enabled under the E3 license. These users can access SPO, they just do not have an SPO tile in the app launcher. Those users who are a part of the OneDrive pilot, as well as a few others, have the SPO license toggled on under the E3 license.
PROBLEM: The usage reports in the O365 Admin portal only show the fraction of the available users (the ones with the SPO license enabled). This means our usage reports are always inaccurate.
i.e., the usage reports list something like "Active users - [x] out of [y]", where y is the number of users that have an SPO license, but the actual number users who can access SPO (with or without a license) is about 10 times greater than y.
Given that the total number of users is inaccurate, it is probable that x (the active users) is also not counting people who access SPO with an E3 license that has no SPO component turned on.
Star D. commented
We have more than 3300 users with an E3 license.
All of these users can access SPO, even when SPO is not toggled under E3.
Usage reports for email and Skype say "out of 3300".
Usage reports for SPO and OneDrive say "out of 290".