Microsoft Graph External

Microsoft Graph External is the set of Microsoft Graph capabilities (the /external namespace) that lets you bring content from thirdparty apps and lineofbusiness systems into Microsoft 365. You create external connections, define a schema, and push items (with ACLs and properties) so Microsoft indexes them and makes them available in Microsoft Search, Viva, and Copilot alongside native M365 data. It supports security trimming, incremental updates and deletions, activity signals, and querying via the Graph search API, and you can use prebuilt connectors or build custom ingestion with the API.