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springct-akouodev's avatar
springct-akouodev
Copper Contributor
Jan 27, 2022

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 tried the following -
"/copy" endpoint with either user's authentication results in 404 error - The resource could not be found.

"/invite" endpoint with user A's authentication, then "/sharedWithMe?allowexternal=true" with user B's authentication - does not list the shared file.

 

2 Replies

  • GhulamMujtaba's avatar
    GhulamMujtaba
    MCT
    Jul 07, 2026
    • Use /invite or createLink to share the file from User A (Tenant Y) with User B (Tenant Z).
    • Authenticate User B against Tenant Y (as a B2B guest) and access the file via the /shares/{shareId} API.
    • Download the file, then upload it to User B's OneDrive in Tenant Z.
    • Cross-tenant /copy is not supported, and sharedWithMe is not recommended for this scenario.
  • Kidd_Ip's avatar
    Kidd_Ip
    MVP
    Jul 06, 2026

    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.