I have an ipoffice with about 100 users. I have 1 person whose VM is turned off about every 7-10 days. I reset it to on and a week later it is off again. I can't find any timed events or COS differences.

At this same location I ALSO have 3 IP phones in one building out of 20 that lose their addressing so the VLAN needs to be reset about once a month.

Coincidence?