The process manager is not executing outbound email notification rules. The following errors are seen:
Rule : Action Failed: [Send Email][To All Members in Assigned Queue] Using [1 Parameter]. Error: Unable to send emails due to an error -> Transaction failed. The server response was: 5.2.0 STOREDRV.Submission.Exception:SendAsDeniedException.MapiExceptionSendAsDenied; Failed to process message due to a permanent exception with message Cannot submit message. 0.35250:1A400000, 1.36674:0A000000, 1.61250:00000000, 1.45378:02000000, 1.44866:EB220000, 1.36674:0E000000, 1.61250:00000000, 1.45378:F0220000, 1.44866:24020000, 16.55847:31130000, 17.43559:0000000024020000000000000000000000000000, 20.52176:140F058E1500F01F00000000, 20.50032:140F058E8517F01F00000000, 0.35180:140F058E, 255.23226:38400000, 255.27962:0A000000, 255.27962:0E000000, 255.31418:1F000130, 0.35250:0200DB30, 1.36674:0A000000, 1.61250:00000000, 1.45378:02000000, 1.44866:4A000000, 1.36674:32000000, 1.61250:00000000, 1.45378:4F000000, 1.44866:01000000, 16.55847:B6000000, 17.43559:00000000A003000000000000FC00000000000000, 20.52176:140F058E1500101053000000, 20.50032:140F058E8517000055000000, 0.35180:58000000, 255.23226:4800D13D, 255.27962:0A000000, 255.27962:32000000, 255.17082:DC040000, 0.27745:6B000000, 4.21921:DC040000, 255.27962...
Release : 8.5 RU3
This issue started after upgrading to MS Office 365
The email configuration inside ServiceDesk needs to match that of MS Office 365 now that it has been installed. It's likely something as simple as ServiceDesk is now sending to the wrong SMTP server address. The following documentation will help with this:
ServiceDesk Administrator Guide
ServiceDesk - Configuring the Outbound and the Inbound Mail Settings