I have 5 Exchange 2013 servers (CAS01, CAS02, MBX01, MBX02 and MBX03). I'm trying to setup Lync 2013 integration and the first thing it mentions is:
"you must first verify that the Unified Communications Managed API 4.0 Runtime has been installed in your Microsoft Exchange Server 2013 backend server"
When I look it is installed (see it under add/remove programs) but on all three of my MBX servers this key is missing:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchange OWA\InstantMessaging\
and
Microsoft.Rtc.Internal.Ucweb.dll is not under the clientaccess BIN directory.
Any reason for htis?