In a recent migration from SBS 2011 to a new domain with 2008R2 and Exchange 2013, there had been an pre-existing and published email address of service@.... that was in use. When everything migrated over and we tried creating an account in AD it was denied and neither could we create a new email of service@... When calling microsoft they said that the service account is hardcoded in 2012 and we could not even use the service@... email as an alias with another account. This all sounds odd to me.
If indeed Microsoft had done a carte blanche limitation like this, is there a way in the mailflow setting of Exchange 2013 to reroute the email to service@.... and reroute to another account like services@....?