We did removed Root Enterprise CA Server (StandAlone) from our server for X reason.
Old servers and DC was moved to new servers and successful configured. And for now everything is working more then perfect.
But users start to get certificate error at there computers from Outlook. They does same hosted exchange server and there was no any changes.
Certificate error show that signed certificate was expired at 2009. Root certificate is till 2018.
What I should to do ?
(Create GPO to move them to untrusted or revoked or some any other ideas)
I need to prevent workstations from poping up this error/warning message.