DIXF service account validation - authorization failure

Hi All,

I have an issue ,when I click the DMF validate service account access to directory button, Get below error.

System.Exception

at Microsoft.Dynamics.AX.DMF.ServiceProxy.DmfEntityProxy.DoWork[T](Func`1 work)

And I checked the windows logs error. I added DMF account to user group and the shared file path is read and write for the DMFaccount. anyone can give me some suggestion?

DMF1942
at Microsoft.Dynamics.AX.DMF.SSISHelperService.Authorization.AuthorizationManager.CheckAccessCore(OperationContext operationContext)