Microsoft DNS error 4000 and error 4007

Recently we had “Patch Monday” – unusual since we usually patch on Fridays (in case something goes wrong we have weekend ahead), but this one time was good opportunity since there was some infrastructure work and we had planed downtime and we took the opportunity to patch.

Unfortunately something went very wrong. First after rebooting one of the Exchange servers I got following error:

Exchange ECP / The LDAP Server is unavailable

“Topology Provider couldn’t find the Microsoft Exchange Active Directory”

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Windows Server 2012 R2 with Exchange freezes on Hyper-V Integration Services Update

I thought that errors while updating Hyper-V Integration Services were thing of a past, but Microsoft Updates from January and February 2018 are proving me wrong The problem is, you update Hyper-V Integration Services on Windows Server 2012 R2 with Exchange install on it and it freezes.

In my experience it does not happen on every installation, one member of an Exchange DAG would pass update normally, while other one would fail, and both have exact same configuration, so the problem is quite unusual. Read More

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