SSL certificate issued to someone else reaching machines on my network - Microsoft Community


really strange one. have network of around 150 machines , 1 of domains sold part of business last year. domain has been removed accepted domains somehow, cert still on users machines. due domain not being ours, getting security alert when opening outlook stating : name of security certificate invalid or not match name of site. when viewing certificate can see it's certificate never registered , belongs new domain owner.

deleting certificate doesn't comes back. there no gpo on our network pushing (obviously it's not our cert) , ezyreg have no idea , can't help.



logging onto users machines, , mmc > certificates > other people > certificates - can see certificate in there. can't see on of other servers.




any appreciated.

try options given here:

https://support.microsoft.com/en-us/help/2772058/-the-name-on-the-security-certificate-is-invalid-or-does-not-match-the-name-of-the-site-error-in-outlook-in-a-dedicated-or-itar-office-365-environment



Office / Outlook / Other/unknown / Office 2010



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