Exchange machine time sync

[trackstar]

For the exchange machines, do you guys have the VM Tools set to "Synchronize guess time with host"? Currently we don't have it checked and a recent random reboot of the machine have us thinking a "stunt" moment during the backup caused the machine to lost track of its time with the domain controller. Trying to get some feedback here.

TT

[Gostev]

I believe it's not recommended to enable this settings in domain environments. Exchange is supposed to sync time with domain controllers, otherwise Kerberos authentication may start failing.

[Pat490]

exactly. DCs should have external time source and all member servers sync with DC

[trackstar]

exactly. DCs should have external time source and all member servers sync with DC

Thats what we have set. Exchange admin said their machine was rebooted because I don't have it set and during a stunt, it doesn't know where/when it is

[trackstar]

For an Exchange backup, the machine has to be powered on? I am assuming due it being a database and the need to truncate the logs.

We are on a DAG setup with 2 backup Exchange servers. Currently backing up the passive.

[foggy]

Typically backup of a live VM is performed, since Exchange downtime is not desired.

Here's a good thread with many tips on backing up DAG.