You might want to add SERVICES_DOMAIN= to the msiexec command line. I found that bypassed the Jabber client asking questions for the users at login time.
I have just usedmsiexec.exe /i CiscoJabberSetup.msi /quiet CLEAR=1 AUTHENTICATOR=CUP CUP_ADDRESS=cup-server-name SERVICES_DOMAIN=example.localTo install the 9.6.1 client which has worked to install Jabber and when logging in it has worked using just ...