When one of the virtual groups in the Windows Server 2003 MSCS cluster owns more than two virtual IP addresses and the Windows Time service is working in NT5DS mode, you receive multiple errors in the System event log that are similar to:

Event Type: Error
Event Source: W32Time
Event ID: 29
Description: The time provider NtpClient is configured to acquire time from one or more time sources, however none of the sources are currently accessible. No attempt to contact a source will be made for 15 minutes. NtpClient has no source of accurate time.

To workaround this behavior, make sure that the Windows Time service is working in NTP (Network Time Protocol) mode:

1. Open a CMD.exe window on the PDC emulator.

2. Type the following commands and pressing Enter after each line:

net stop W32Time                              REG ADD HKLM\SYSTEM\CurrentControlSet\Services\W32Time\Parameters /V Type /T REG_SZ /F /D "NTP"                              net start W32Time
NOTE: See:

How do I configure the Windows Time service on the Windows Server 2003 forest root PDC emulator?

How do I configure an authoritative time server in Windows 2000?

How do I configure the Windows time service to log when time is adjusted?

How do I find Simple Network Time Protocol Time servers on the Internet?

Windows Time Service Technical Reference.

Windows Time Service Tools and Settings.