TMG form logins stopped working after certificate expiry
2 days ago, we noticed we couldn't login to HTTPS addresses from outside to inside such as webmail or VLE. Whenever we logged in, we got this:
We noticed a certificate had expired. It is a local certificate which appears on every workstation and server. It seems to be one that is issued by the domain controller. We removed this certificate off the domain controller and the TMG server, as well as critical servers like Exchange and SharePoint (VLE). There is another certificate already on these machines with a valid expiry and intended for "All Purposes".
We have performed a gpupdate on the all servers but we still get the above error when logging into anything that passes through TMG. Any ideas what else it could be? Thanks.
If we go to TMG Best Practise Analyser we see: