If you need to see how many active users you have in Dynamics 365 / 365 - this KB article will walk you through the steps.
Steps to Find active users
- Click on the Advanced Find in the top right corner
- Under Look For , choose Users
- Set the Status Attribute Equals Enabled.
- Set the next condition to Access Mode.
- Set this equal to Read-write and Write.
- Click the Results button
- The number of active users is displayed in the bottom left hand corner.