how do i find a file id?

None of the options work for me, or at least that I could get working.

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Dear @PROMCT

Welcome to Microsoft Q&A Forum!

Thanks for sharing the details. I ran two tests using your exact endpoint and a variant without “items”, both returned OK and listed file IDs:

Note: Please make sure that you added a permissions checklist the recipient should verify before retrying:

• Delegated (/me/…): Files.Read or Files.ReadWrite (minimum).
• Application (client credentials): Files.Read.All or Files.ReadWrite.All, and make sure Admin consent is granted.

• https://graph.microsoft.com/v1.0/me/drive/items/root/children?$select=id,name

• https://graph.microsoft.com/v1.0/me/drive/root/children?$select=id,name

/me/drive/items/root/children uses the items-by-ID pattern, where root is a well-known alias for the root driveItem, then lists that item’s children.
/me/drive/root/children uses the relationship from the Drive to its root container, then lists that item’s children.

In practice, both return the same set of children (files/folders at the OneDrive root) when permissions and provisioning are OK. The first form is the one shown in Microsoft Learn examples and is preferred for clarity.

References:

• List children of a driveItem
• DriveItem resource type
• Drive resource type

Therefore, when your call still returns 404 and itemNotFound, the reasons may cause it:

• OneDrive has not provisioned for the user yet. Please have them open OneDrive on the web once, then retry /me/drive or /me/drive/root/children. Reference: Get Drive

• Auth flow mismatch. If you’re using an app‑only (client credentials) token, switch to /users/{userPrincipalName}/drive/... instead of /me/...; or test with a delegated user token in Graph Explorer. Check more details in Get Drive article above.
• Wrong store. If the target file is in SharePoint/Teams (not personal OneDrive), use /sites/{siteId}/drive/root:/ (e.g., “Shared Documents/…”). References:
  • https://stackoverflow.com/questions/55004104/microsoft-graph-api-getting-files-by-file-path-404-not-found
  • https://stackoverflow.com/questions/77198708/get-sites-site-id-drive-root-item-path-stopped-working

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I hope this information can give you more insights. Wish you a pleasant day!

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