Is there a feature for Azure similar to Amazon Time Sync Service which can be used with Azure VMs to have time synchronization without Internet access?

I could also find references to 0.amazon.pool.ntp.org, does Azure has something similar?

Ref: https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/set-time.html#configure_ntp

  • Note that using 0.amazon.pool.ntp.org does require Internet access. The AWS Stratum 3 NTP clock that does not require Internet access is accessible at Apr 3, 2018 at 23:41
  • @Michael-sqlbot, yes that's right.
    – Ranjandas
    Apr 4, 2018 at 4:27
  • @Ranjandas finally did you find any such service for Azure? :D
    – beginer
    May 8, 2019 at 2:07
  • 1
    @beginer The closest you could get based on Azure documentation is to depend on the host timing on which the VM is running using VMICTimeSync. azure-doc. Hope this helps.
    – Ranjandas
    May 8, 2019 at 4:52

1 Answer 1


In fact, Azure VM needs Internet access, if you block all Internet access, you could not access this VM. Azure VM need access Azure data center. Port 80 and 443(outbound) need enable.

In a Azure VM, you could not modify the time, Azure will auto time sync the time.

More information about this please refer to this blog.

  • Any update about this? Apr 5, 2018 at 7:24
  • Reference is woefully out of date, your advice is totally incorrect as of the answer date
    – rmalayter
    Apr 28, 2019 at 3:23

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