Appendix E Setting up the NTP Server (Windows)
E.2 NTP Settings in Windows Server 2012 and Windows Server 2012 R2
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E.2.2 Synchronization Interval and Startup Settings of NTP Service
1. Enter "regedit" in [Search] to start the Registry Editor.
FIGURE E.5 [Registry Editor] selection window
2. Open the following key, and set 900 for the SpecialPollInterval value.