Graph API - Workbooks - Create Session - Could not obtain a WAC access token

Question

Hi,

We have an internal client to Graph API in Python to work with Worksheets. It starts refreshing tokens if needed and calling the createSession endpoint. It was created years ago and was working fine until recently. We started receiving the following error:

{"error":{"code":"AccessDenied","message":"Could not obtain a WAC access token."}}

The client works with OneDrive and Sharepoint accounts, just for OneDrive it stopped working. We usually call this endpoint:

POST me/drives/{driveId}/items/{id}/workbook/createSession

But we also tried to call:

POST me/drive/items/{id}/workbook/createSession

Another detail is that we are working with .XLSX files.

It was working fine, I checked if the code was changed, but no changes were made. I also tried to test using the Graph API Explorer and it did not work.

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

Could someone guide me to solve this issue?

Thanks.

Answer 1

Hello @Lucas Klassmann ,

I would recommend you to raise a support case with Microsoft Graph, a Support Engineer will be able to assist you better. You can raise support ticket from
http://aad.portal.azure.com/ or https://admin.microsoft.com/#/support/requests.

I would also recommend you to refer to this similar posts: https://learn.microsoft.com/en-us/answers/questions/1190965/could-not-obtain-a-wac-access-token

https://learn.microsoft.com/en-us/answers/questions/1190202/microsoft-graph-files-api-not-downloading-the-late

Hope this helps.

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