Ntp windows server 2008 r2 pdc

This is the main thing that breaks when the server goes out of sync, it's no longer authenticating DC user sessions - no GUI, no logon. The most common reason for this is a VM that syncs time from its host, and the host's time is off.

Jiten's post from is the short version, but the technet article explains the how and the why. To continue this discussion, please ask a new question. Get answers from your peers along with millions of IT pros who visit Spiceworks.

Spicy Hi to All Here's yet another theoretical problem that probably has been experienced by many. Popular Topics in Windows Server. Spiceworks Help Desk. The help desk software for IT.

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Contents Exit focus mode. Please rate your experience Yes No. Any additional feedback? Note If an authoritative time server that is configured to use an AnnounceFlag value of 0x5 does not synchronize with an upstream time server, a client server may not correctly synchronize with the authoritative time server when the time synchronization between the authoritative time server and the upstream time server resumes.

Therefore, if you have a poor network connection or other concerns that may cause time synchronization failure of the authoritative server to an upstream server, set the AnnounceFlag value to 0xA instead of to 0x5. If an authoritative time server that is configured to use an AnnounceFlag value of 0x5 and to synchronize with an upstream time server at a fixed interval that is specified in SpecialPollInterval , a client server may not correctly synchronize with the authoritative time server after the authoritative time server restarts.

Therefore, if you configure your authoritative time server to synchronize with an upstream NTP server at a fixed interval that is specified in SpecialPollInterval , set the AnnounceFlag value to 0xA instead of 0x5.

Note Peers is a placeholder for a space-delimited list of peers from which your computer obtains time stamps. Note TimeInSeconds is a placeholder for a reasonable value, such as 1 hour or 30 minutes Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem.