Generally a hard reboot of the UM8000 will solve this by pressing the Grey load button until the left most LED flashes. Can't say that I've seen this with the UM8000 in the past few years. The only time I've seen this is if the UM8000 was in the system when it was defaulted and picked up the default time and date.

I found this in the UM8000 manual
"5.3 Setting Up UM8000 Date and Time
The UM8000 Mail automatically synchronizes its time and time zone with the phone system time on boot up. Manual adjustments on the voice mail are not needed or available." which doesn't help much..

Regards,

Paul W
Now back to a 0 day week. Love these 7 day weekends.