Dear All, I have running Exchange Server 2010 SP1 with windows Server 2008 R2. I getting the error log: The time service detected a time difference of greater than 5000 milliseconds for 900 seconds. The time difference might be caused by synchronization with low-accuracy time sources or by suboptimal network conditions. The time service is no longer synchronized and cannot provide the time to other clients or update the system clock. When a valid time stamp is received from a time service provider, the time service will correct itself. Do you have any idear and solution? BR, Khemarin SetKhemarin333@hotmail.com

Hello, you a time sync problem. Please make sure that each server / client computer is using the PDC Emulator for time sync and that this DC is available. Also, make sure that the PDC Emulator is syncing time with a public NTP server. Refer to that: http://social.technet.microsoft.com/Forums/en/winservergen/thread/1946eb1b-e677-456c-86aa-0308a8cb834f This posting is provided "AS IS" with no warranties or guarantees , and confers no rights. Microsoft Student Partner 2010 / 2011 Microsoft Certified Professional Microsoft Certified Systems Administrator: Security Microsoft Certified Systems Engineer: Security Microsoft Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Applications Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows 7, Configuring Microsoft Certified IT Professional: Enterprise Administrator Microsoft Certified IT Professional: Server Administrator

try in elevated command prompt: w32tm /resync /rediscover additionally doulbe check that your server has proper time source [generally it should be DC with PDC role] also check that there are no network issues to sync time from that DC (port 123 closed on firewall for example)With kind regards Krystian Zieja http://www.projectenvision.com Follow me on twitter My Blog Need help with your systems?

Hi, Usually the domain controller that holds the PDC emulator role holds also the time setting for the whole domain. If you want to make some adjustments check this, http://support.microsoft.com/kb/816042 Try configuring a different time source. For a list of time servers available on the internet go to http://support.microsoft.com/kb/262680. Good luck. MCTS...

Check this Meinolf Weber's article. Thanks

Hello, make sure that no firewall blocks port 123 udp so it can connect to an available DC for time sync. Please run the following command on the server to resync: w32tm /config /syncfromflags:domhier /update After that you have to run: net stop w32time net start w32timeBest regards Meinolf Weber Disclaimer: This posting is provided "AS IS" with no warranties or guarantees , and confers no rights.

Thanks for all reply. BR, Khemarin SetKhemarin333@hotmail.com