When you have an active Cloud Backup subscription you are charged per user per month, based on the monthly peak number of Microsoft users backed up. 

About the Peak Usage Reports

So you can see what that means for you, two reports are available: 

1. Previous Month Peak Usage: This report helps you confirm that any charges you incurred are correct, as well as identify where those charges came from. It contains a row for each User, identified by their Microsoft Tenant and that Tenant's ID. For each user you can see whether and when they were counted in the High Water Mark (HWM). This report should match the charge for the current month. For example:
   
    
2. Current Month Peak Usage to Date: This report helps you predict what the starting user count will be for the next month, which you can use to verify removed integrations. It contains the same rows and columns as the Previous Month Peak Usage report, but supplies an additional column of "Current Status (Enabled). In this report, the HWM is the minimum and best available predictor of what the charge might be for (not in) this month. For example:
   

Access the Peak Usage Reports

To access these reports, follow these steps:

1. Navigate to Admin > Integrations - App Center.
2. Select the Syncro Cloud Backup app card. (You'll find Cloud Backup under the “Backup” category.)
3. Locate the Pricing section, then click the link for the report you want:
   
4. An Excel spreadsheet (.xlsx) containing the data you requested downloads to your workstation.