We are in the process of migration our onprem Exchange 2010/2016 to Office365. F5 is currently the smtp proxy for office365. We are running into an issue where the SMTP header “X-MS-Exchange-Organizatio
n-AuthAs” is marked with “anonymous” whereas it needs to show as "Internal" in order for Out of Office messages to be interpreted correctly. Is there way to have the Virtual Server retain the message headers from office365 and not get altered by the F5.