Is there any graph api to grant access to externalUserID for sharepoint files[ files shared in teams channel]?

Question

Does /invite API work explicitly for driveItem?

If I want to grant access to an external user for file sharing in the channel, can we use the same /invite API ? because in this case though /invite API returns 200 success but when I try to fetch permissions of that file .....granted user still dosen't have permission.

I have used the below two APIs for granting access to the team's channel file.

https://graph.microsoft.com/v1.0/sites/{site-id}/drive/items/{item-id}/invite

https://graph.microsoft.com/v1.0/shares/{encoded-sharing-url}/permission/grant

but still, the permissions array is not updated with the new user - https://graph.microsoft.com/v1.0/drives/{drive-id}/items/{item-id}/permissions

Answer 1

Hi @Satyam Yadav

You should be able to modify this example:

 POST /me/drive/items/{item-id}/invite  
 Content-type: application/json  
      
 {  
   "recipients": [  
     {  
       "email": "user@externaldomain.com"  
     }  
   ],  
   "message": "Here's the file that we're collaborating on.",  
   "requireSignIn": true,  
   "sendInvitation": true,  
   "roles": [ "write" ]  
 }  

See: https://learn.microsoft.com/en-us/graph/api/driveitem-invite?view=graph-rest-1.0&tabs=http

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Answer 2

Hi @Satyam Yadav ,

I tested permission grant, able to add external user existing share link created using /drive/items/{id}/invite.
Screenshot of grantedToIdentities of a driveItem with only 1 external user.

Using Grant permission able to add another external user, below sample snippet.

POST https://graph.microsoft.com/v1.0/shares/{encoded-sharing-url}/permission/grant  
Content-type: application/json  
  
{  
  "recipients": [  
    {  
      "email": "john@contoso.com"  
    },  
    {  
      "email": "ryan@external.com"  
    }  
  ],  
  "roles": ["read"]  
}  

Screenshot of my test response body.

It will work with the sharing links that have "scope": "users".

Hope this helps.
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