Graph API search of SharePoint document library return empty for some users

Question

We're using the Graph .NET sdk to search a SharePoint document library in an Azure app, using delegate permission. Most users get good results. But some are empty with the same query. Both groups can access the same library via the SharePoint UI, so they both have access in SharePoint.

It seems "external/guest" users are the one not getting results.

Is there additional permissions we missed?

Answer 1

Hi @Chan, Kelly ,

As far as I know, MS Graph API search is not supported for external users. It would return "BadRequest" for external users.

Here are two options for you:

• use Application permissions for the app
• use SharePoint CSOM to perform search : https://learn.microsoft.com/en-us/sharepoint/dev/general-development/using-the-sharepoint-search-query-apis

---

If an Answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.