Could not obtain a WAC access token

[vjanuario]

I have a few flows that access Excel files via OneDrive personal and have been working well for over a year. Today, they all stopped working at the same time. I'm getting this error. Does anyone know what could have happened? It seems my flows no longer connect to Exel.

Could not retrieve values. The dynamic invocation request failed with error: {
  "status": 403,
  "message": "The request is forbidden by Graph API. Error code is 'AccessDenied'. Error message is 'Could not obtain a WAC access token.'.\r\nclientRequestId: 48cb2c99-3612-4792-80e8-bdc9b9970fe6\r\nserviceRequestId: 6497cdea-2ca8-4eaa-99e8-be4e0f431a46",
  "error": {
    "message": "The request is forbidden by Graph API. Error code is 'AccessDenied'. Error message is 'Could not obtain a WAC access token.'."
  },
  "source": "excelonline-cus.azconn-cus-001.p.azurewebsites.net"
}.

[Mnljndr95]

Did you manage to solve the issue? I'm having the same exact problem, and setting the connections up again does nothing. Thanks in advance!

[vjanuario]

No change. I've searched everywhere for a solution and cannot find one. I hope it's a temporary Power Automate issue that gets resolved soon. Have you learned anything?

[vjanuario · Accepted solution]

I repaired the flows by creating another Excel connection in the Connections tab. Then I repaired each of my flows that used the Excel connection by selecting the "new" connection for each Excel action. It took me over 2 hours, but everything works now. I was thinking of just waiting in case it's a temporary glitch, but I needed these flows to run because I have other tasks that rely upon them.

[kaustabh]

I too was facing the same issue. However after changing the excel file type to "Microsoft Excel Worksheet" the issue got resolved. Initially my File type was "Excel 97-2003 Workbook" So basically the file type needs to be changed from .xls to .xlsx

[Ab3l]

Hey I am facing the same issue, and sadly changing connection also not working! 

Ref: https://powerusers.microsoft.com/t5/Building-Flows/Facing-Error-in-Power-Automate-Flow-Could-not-ret...

[Ab3l]

Was you able to fix it, mate? how did you do?