Forum Discussion
Explicitly sharing files externally
Requirement: Let user A (in tenant/org Y) share a file with user B (in tenant/org Z) and allow user B to access or copy this file to their storage programmatically. Can this be achieved? I have t...
I believe yes, cross‑tenant file sharing and programmatic access are supported by Microsoft Graph, but only through the driveItem: invite and sharedWithMe endpoints with proper delegated permissions and external sharing enabled in both tenants. The /copy endpoint cannot operate across tenants, which explains your 404 error.