Inventory Microsoft 365
In order to populate the Microsoft 365 page you must extend hardware inventory to include the Office 365 ProPlus Configurations WMI classes from the root\cimv2 namespace from a Windows 10 computer . Ensure the following items have been added to Hardware Inventory. Skipping this step will not generate any errors however, the Microsoft 365 page will be blank.
For more information on extending Configuration Manager hardware inventory see the section Add a new inventory class on the How to extend hardware inventory in Configuration Manager documentation page.