Tag: Tenant identifier

Every Microsoft 365 tenant has a tenant identifier, a unique GUID that’s used within the Entra ecosystem to identify a tenant and its objects. Much has changed since I last wrote about this topic in 2021, including the introduction of new Graph APIs to resolve tenant names to identifiers and vice versa.

Every Microsoft 365 tenant has a tenant identifier. Sometimes you need to know what the identifier is, so here are several options to find it from PowerShell to the Azure AD portal to an external service. Tenant identifiers are public and need to be, otherwise apps wouldn’t be able to find the data they want.