Hi Nathan,
Officially its not supported, please check the following enhancement
https://tools.cisco.com/bugsearch/bug/CSCuo06018/?reffering_site=dumpcr
Jabber for Windows - Enhancement request to disable privacy settings
CSCuo06018
You can try an unsupported option though as explained in the following post
https://supportforums.cisco.com/discussion/11764816/removing-privacy-options-jabber-windows-clients
Manish
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