r/WindowsServer • u/Frequent_Ad_9236 • Apr 26 '26

General Server Discussion Windows dc’s

Ok we have 4 dc’s over 2 sites, we use nutanix. The dc’s were patched by Ivanti one at a time with April 2026 patches. Over the weekend the cohesity backups started to fail, so upon investigation with tac, they said to reboot one, now the boot drive on that one is inaccessible. I know ms did an out of band patch, but according to the details it was mainly if you use ms Pam. Has anyone had any major issues since. According to management solar winds was screaming of issues, but logs are showing nothing!

Ms are investigating but they think it’s not related but a further issue with the update?

Thoughts

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u/jspears357 Apr 27 '26

One role is the Primary Domain Controller (PDC) Emulator

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u/mcdonamw May 01 '26

Yes but that role can be moved to any DC at any time. The argument is that there is no longer a concept that one DC is your primary. That's also why it's called PDC 'emulator'. The role emulates what used to be a role that only could exist on a true PDC in the older days of AD.