Microsoft Previews userConfiguration Graph API

A new userConfiguration API is available to retrieve data from Folder Associated Items (FAIs) in Exchange mailboxes. The new Graph API is part of the EWS migration project and is intended to allow application developers to migrate EWS code that updates FAIs with Graph equivalents. Most Microsoft 365 tenants will never use this API, but it’s nice to know how things work.

https://office365itpros.com/2026/02/05/userconfiguration-api-beta/