Hey folks!
Just upgraded your Exchange 2013 to CU9 and trying to use great future
"MessageCopyForSentAsEnabled" that was returned from E2010, but unfortunately you get error:
"A parameter cannot be found that matches parameter name 'MessageCopyForSentAsEnabled'.
You forgot to do one thing before upgrade !
You should run PrepareAD command before (or after) upgrade, because CU9 setup doesn't do that for you.....
Setup.exe /PrepareAD /IAcceptExchangeServerLicenseTerms
Good luck!