We have a ex 2003 and 2010 in coexistence mode, 2010 has a public cert installed mail.domain.co.uk. This is assigned to all servers and services and the virtual directories are set to this.
We have an issue where when users open outlook they get a certificate error due to a name mismatch. This is because outlook is connecting to servername.domain.local and that obviously is not included on the cert. A Cas array exists Cassite1.domain.co.uk. This affects all 2003 and 201 users