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Internal SSO broken in Windows 2008 R2 AD environment

Everything was working up to about 2 months ago.  Where used to be able to go to an internal website (either IE or chrome) and you did not get prompted to logon, SSO worked.  The only thing that I can think of that has changed is the replacement of our W2008 R2 Domain Controllers with W2012 R2.  In doing so I did away with our Certificate Authority.  I'm no expert here, especially when it comes to CAs, but I do suspect this could be the reason.
I have verified the Group Policy Site to Zone assignments and that has not changed, so either it's a Windows update or the change out of our domain controllers (and/or CA).
Can some body please shed some light for me?  Thanks
Active DirectoryWindows Server 2012

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8/22/2022 - Mon