Hello,
I have Exchange 2010 sp3 running on win server 2012 R2 sp1 standanrd. I would like to upgrade to exchange 2013 and I read that installation of exchange 2013 is coexistent with exchange 2010 already installed. But When I try to install exchange 2013 I keep getting this error :"Exchange server is in an inconsistent state. Only disaster recovery mode is available. Please use Setup /m:RecoverServer to recover this Exchange server." But after closing set up the server is still running fine.