hi gurus, is there a way to sync time for all DC's in an AD environment? let's say I have 5 DC's, can I change the time on any of the DC and then replicate the time change for all the DC? how do i do this? thank you. Every second counts..make use of it.

AD has a built-in domain-hierarchy based time synchronisation mechanism. This is the default mechanism, but can be changed. http://technet.microsoft.com/en-us/library/cc773013(v=WS.10).aspx You will need to configure the DC that holds the PDC Emulator FSMO role to obtain time from an authoritative source (either external or hardware-based).Tony www.activedir.org blog:www.open-a-socket.com

Hello, Agree with Tony. By default, DCs automatically sync time with the PDC Emulator. If you want to manually sync time on a DC, run the command w32tm resync. For more about w32tm, refer to http://technet.microsoft.com/en-us/library/bb491016.aspx Thanks Zhang

hi gurus, is there a way to sync time for all DC's in an AD environment? let's say I have 5 DC's, can I change the time on any of the DC and then replicate the time change for all the DC? how do i do this? thank you. Every second counts..make use of it. Cguan, I agree with others, DC's follow their own time hierarchy (UTC Timing convetnions), Time displayed on computers are only for human's. Even If you change the time on one of the DC it does not effect the time hierarchy. You need to understand the follow. External Time source---->PDC Emulator holding DC------>Other Domain controllers--------->All client computers. or Internal Time source---->PDC Emulator holding DC------>Other Domain controllers--------->All client computers. Refer below flowchart, Please refer below techwiki article http://social.technet.microsoft.com/wiki/contents/articles/8863.time-service-configuration-on-pdc-emulator-fsmo-role-holding-domain-controller-en-us.aspx Hope this information helps Regards, _Prashant_ MCSA|MCITP SA|Microsoft Exchange 2003 Blog - http://prashant1987.wordpress.com Disclaimer: This posting is provided AS-IS with no warranties/guarantees and confers no rights.

Hello, there is not tool required, it is built in complete and you just have to use, if possible, an external time source for the PDEmulator FSMO DC, that's it. More details in: http://msmvps.com/blogs/mweber/archive/2010/06/27/time-configuration-in-a-windows-domain.aspxBest regards Meinolf Weber MVP, MCP, MCTS Microsoft MVP - Directory Services My Blog: http://msmvps.com/blogs/mweber/ Disclaimer: This posting is provided AS IS with no warranties or guarantees and confers no rights.

Hello, there is not tool required, it is built in complete and you just have to use, if possible, an external time source for the PDEmulator FSMO DC, that's it. More details in: http://msmvps.com/blogs/mweber/archive/2010/06/27/time-configuration-in-a-windows-domain.aspxBest regards Meinolf Weber MVP, MCP, MCTS Microsoft MVP - Directory Services My Blog: http://msmvps.com/blogs/mweber/ Disclaimer: This posting is provided AS IS with no warranties or guarantees and confers no rights.

Thank you gurus, for your valuable inputs. How do I check which Time source the PDC emulator is pointing to? Every second counts..make use of it.

Thank you gurus, for your valuable inputs. How do I check which Time source the PDC emulator is pointing to? Every second counts..make use of it. on the PDC emulator go to HKEY_Local_Machine--->System---->CurrentCotnrolSet----->Services---->w32time---->parameters----->check reg NTPservers You willl get the Time source where PDC emulator is pointing. Regards, _Prashant_MCSA|MCITP SA|Microsoft Exchange 2003 Blog - http://prashant1987.wordpress.com Disclaimer: This posting is provided AS-IS with no warranties/guarantees and confers no rights.

w32tm /query /statusKind regards, Tim MCITP, MCTS http://directoryadmin.blogspot.com This posting is provided 'AS IS' with no warranties or guarantees and confers no rights.