All of those are configuration issues, go thru the config guide once again and review it step by step and make sure it's all properly configured.
Jabber is not registering to CUCM, it has not been configured as a softphone, or the deskphone association is wrong.
If you can see the DN info from the users but not able to call, then at least your directory integration is fine.
DNs not reachable is again a config problem with call routing, CSS and partitions.
HTH
java
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HTH
java
if this helps, please rate