I have a SBS 2011 Standard server up and running. It's been running for a few weeks now. Just the other day, I noticed the clock was off by several hours. Any attempt to change the clock through the time and date settings have failed. It just reverts back to the origional time when I click ok. I thought I set the correct date and time I first set it up. It is running all of the default rolls.AD/DNS, DHCP, Web, Exchange......