We are using Esna voicemail along with Outlook 2003. I have a user who will set his out of town office assistant on a friday for the weekend. When he comes back in on monday we will set it back to being in the office. Everything appears to be working fine.
Now, he leaves his desk for period of time, his PC will go into standby and when he returns he will need to ctrl-alt-del to login. When he does so, his out of office assistant is turned on when he clearly had it set for in the office.