I may have done the following wrong, Exch 2007 is new to me but I was under the gun...
Today our autodiscover certificate expired. I renewed it from Exchange with Get-NewExchangeCertificate
After I renewed the cert, I enabled it and removed the old. OWA stopped working when the original certificate expired, so I exported the cert and installed it to the ISA servers and voila - everything appeared to resume.
Users with Outlook 2010 get the attached security alert
Information you exchange with this site cannot be viewed or changed by others. However there is a problem with the site's security certificate.
The security certificate was issued by a company you have not chosen to trust. View the certificate to determine whether you want to trust the certifying authority.
Users with outlook 2007 are not getting this security warning.
Exchange 2007 8.2 Build 176.2
W2K 2003 R2 SP2 x64
2 node CCR Cluster
Workstations are XP with Outlook 2007 or 7 with Outlook 2010.
Can anyone tell me what I may have done wrong or what I need to do prevent this security alert from popping up?