When you check the IM address by Rightclick on contact > View profile. The "IM Address:" value does  match the value in CUP for the affected contact. ?

you can try adding this line to the .xml filefalse

can you pls tellme which port are you using under CUCM->LDAP->Authentication

The reason for that is cause the incoming gatewaydo not have access to the voicemail partitionsso you need to add the voicemail ports partitions to the incoming gateway CSS

That is correct ,jabber for Mac 9.2does not support deskphone video at this point