Microsoft-graph-docs: Request to add a sharepoint library linked tab in Teams : Error 500

[kiefergrylls]

I'm doing exactly what's described here to add a document library tab to a Teams channel (providing the link the root folder of the document library concerned, entityId set to an empty string :

But the response is a 500 internal server error :

I tried several combinations with the configuration parameters, but it never works. I am thinking that it's a graph API sided problem?

EDIT: I managed to make it worked on graph explorer, but still not on Postman. Might the problem come from the fact that graph uses a user token, whereas, in postman, I want to do this via application token?

[phillipharding]

Today I tried adding a Document Library tab to a Team Channel using the v1.0 and beta endpoints using the request body below - creating Tabs of other kinds (Stream, Forms, Site etc) works fine.

_Update:_ I'm using an application-only access token to call the graph api which doesn't work, if I use a user access token, the call works and the document library tab is added correctly.

{
  "displayName": "Document%20Library%20Tab",
  "[email protected]" : "https://graph.microsoft.com/v1.0/appCatalogs/teamsApps/com.microsoft.teamspace.tab.files.sharepoint",
  "configuration": {
    "entityId": null,         // also tried "" instead of null
    "contentUrl": "https://tenant.sharepoint.com/sites/site/doclib",
    "removeUrl": null,
    "websiteUrl": null
  }
}

Which returns a GeneralException response

{
    "error": {
        "code": "GeneralException",
        "message": "Object reference not set to an instance of an object.",
        "innerError": {
            "request-id": "request guid",
            "date": "2019-03-13T12:28:04"
        }
    }
}

[nkramer]

Thanks for pointing this out, I've opened a bug for this.

[phillipharding]

Is there any update on this?

[mdissel]

Any updates?

[kiefergrylls]

Any news on Microsoft side ?

[phillipharding]

@nkramer is there any progress on this issue?

[nkramer]

The fix has been deployed.

[mdissel]

So now it's possible to use an application-only access token?

[nkramer]

Yes.

[phillipharding]

Thanks @nkramer
Adding a SharePoint Library Tab via an App-Only access token confirmed working today on the v1.0 and beta endpoints.