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I have looked around, and it looks like not updating at startup is by design. If I set SpecialPollInterval to 900, it won't try to update time until the 900 seconds have run out, even with a restart in the middle of 900 seconds. <br />
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My concern is that this hyper-v vm will later be promoted to a DC, and I want to keep the time accurate, and if there was save instead of a shutdown (like the hyper-v host restarting and saving the DC vm), that time may become skewed.<br />
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In the meantime, I set a task when this vm starts to run w32tm /resync /rediscover at startup.<br />
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Does anyone see a problem arising from running w32time /resync /rediscover at startup as local service?
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Yes, time sync is disabled for this vm in hyper-v settings
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Lionelmm's commands produce the same behavior, w32tm does not update time server upon startup, but only upon the timeout of SpecialPollInterval
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Please check your registry setting (regedit) see this link -- <a href="https://technet.microsoft.com/en-us/library/cc773263%28v=ws.10%29.aspx" rel="ugc">scroll down to about the middle of the page</a>
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questioner was very engaged so I must assume this was a pressing issue for him/her and then stopped at the final suggestion -- so that must have worked and this is a viable solution for future questioners <br />
<a href="https://www.experts-exchange.com/questions/28932243/Server-2012-W32time-NTP-synchronization-delay-Hyper-V.html?anchorAnswerId=41502695#a41502695" rel="ugc">https://www.experts-exchange.com/questions/28932243/Server-2012-W32time-NTP-synchronization-delay-Hyper-V.html?anchorAnswerId=41502695#a41502695</a><br />
<a href="https://www.experts-exchange.com/questions/28932243/Server-2012-W32time-NTP-synchronization-delay-Hyper-V.html?anchorAnswerId=41506658#a41506658" rel="ugc">https://www.experts-exchange.com/questions/28932243/Server-2012-W32time-NTP-synchronization-delay-Hyper-V.html?anchorAnswerId=41506658#a41506658</a>
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<div class="content wysiwyg-content">
I manually set server 2012 to synchronize to an external NTP server per microsoft's instructions, and to sync every 900 secs (15 minutes)<br />
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After a restart, running w32tm /query /source returns &quot;local cmos clock&quot;<br />
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w32tm /query /peers shows the 4 ntp servers I configured as pending, with a countdown from 900 seconds.<br />
<br />
After 900 seconds, finally the peers are accepted as a time source. Why doesn't this happen during startup?<br />
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w32tm /monitor is able to get valid time
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I manually set server 2012 to synchronize to an external NTP server per microsoft's instructions, and to sync every 900 secs (15 minutes)

After a restart, running w32tm /query /source returns "local cmos clock"

w32tm /query /peers shows the 4 ntp servers I configured as pending, with a countdown from 900 seconds.

After 900 seconds, finally the peers are accepted as a time source. Why doesn't this happen during startup?

w32tm /monitor is able to get valid time

Server 2012 W32time NTP synchronization delay Hyper-V

Windows Server 2012 is the server version of Windows 8 and the successor to Windows Server 2008 R2. Windows Server 2012 is the first version of Windows Server to have no support for Itanium-based computers since Windows NT 4.0. Windows Server 2012, now in its second release (Windows Server 2012 Release 2) includes Foundation, Essentials, Standard and Datacenter, and does not support IA-32 or IA-64 processors.