Hi,
You can import only three fields (Group Name, Display Name and IM Address) using .XML import contact list. No other fields are supported.
You can also take a look at below URL to utilize BAT tool to update Cisco Jabber contact list:
https://www.cisco.com/c/en/us/support/docs/unified-communications/unified-communications-manager-im-presence-service/212085-How-to-Utilize-BAT-to-Update-Cisco-Jabbe.pdf
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Thanks, Vaijanath S.