Knowledgebase: SSL Technical FAQs
Microsoft ISA server and SAN certificates
Microsoft ISA Server and SAN Certificates
ISA Server 2006 SP1 includes Support for certificates with multiple Subject Alternative Name (SAN) entries in published web servers.
Previous to this release this is not correctly support by ISA servers.
Please insure that you are using ISA Server 2006 with Service pack 1 installed if you wish to take advantage of Subject Alternative Name (SAN) entries in your certificate.