Get-MgUserOutlookMasterCategoryCount
GET /users/{user-id}/outlook/masterCategories/$count (v1.0)
Module: Microsoft.Graph.Users
Permissions
Delegated (work or school)
- MailboxSettings.Read (least privilege)
Delegated (personal)
- MailboxSettings.Read (least privilege)
Application
- MailboxSettings.Read (least privilege)
Source: Microsoft Graph PowerShell SDK metadata
Confirm property-specific permissions, Entra roles, licensing and ownership requirements in the official documentation. SDK metadata outside the verified sample is not independently certified.