Hi
Yes, it's compatible: http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/unity_exp/compatibility/cuecomp.html
See this doc for info on how to use the 'call-agent' command to set it to CUCM:
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/unity_exp/rel7_1/Licensing/CUELicensing_book/Using_CSL.html#wp1092000
Or from the GUI (page 202)
http://www.cisco.com/c/dam/en/us/td/docs/voice_ip_comm/unity_exp/rel8_6/online_help/admin/GUI_PDF/gui_pdf.pdf
I don't believe you need to do a full factory reset as you did pre-7.1, this command deletes 'non-local' config, so local mailboxes, IVRs etc should be intact. It will be things like voicemail networking (VPIM type stuff) that would be lost. Ensure you have a full backup before proceeding.
Aaron
Aaron
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