We are seeing the following error with our SMTP setting today. They have been working fine since we originally set it up.
We noticed that something is wrong with sending emails. Please check SMTP settings. The last detected error: Could not send email from HelpDesk@our.domain via GraphAPI: Status Code: Unauthorized Microsoft.Graph.ServiceException: Code: InvalidAuthenticationToken Message: CompactToken parsing failed with error code: 80049217 Inner error at Microsoft.Graph.HttpProvider.d__18.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.Graph.BaseRequest.d__35.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Microsoft.Graph.BaseRequest.d__30.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Plumsail.HelpDesk.Outlook365.Outlook365Client.d__11.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Plumsail.HelpDesk.Outlook365.Outlook365Client.d__10.MoveNext() --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Plumsail.FP.Exceptionless.Runner.d__2`1.MoveNext()
We've tried updating the SMTP 3 times today, it has worked briefly but then the error returns.