While settings up an Exchange 2010 / Office 365 hybrid I ran into some issues with the Mailbox Replication Service Proxy (MRSProxy). Running the Test-MigrationServerAvailability cmdlet (https://docs.microsoft.com/en-us/powershell/module/exchange/test-migrationserveravailability?redirectedfrom=MSDN&view=exchange-ps) generated a 405 error “Method Not Allowed.”
I double checked all the settings and everything looked good. Eventually, though, I found a support article that pointed to an issue with IIS: https://docs.microsoft.com/en-US/exchange/troubleshoot/move-mailboxes/hybrid-deployment-errors
The CAS didn’t have the svc-Integrated handler mapping, but it did have an svc-Integrated 4.0 hander mapping. Working under the assumption that the new version wasn’t working properly I ran the suggested fix:
From an elevated command prompt, change to C:WindowsMicrosoft.NetFrameworkv3.0Windows Communication Foundation and run ServiceModelReg.exe –r
Test-MigrationServerAvailability came back with good results afterwards, and I was able to add the migration endpoint to Office 365.
Shane Skriletz, PEI
