Install a certificate for Exchange 2007

1- Preparation

To install the certificate in Exchange 2007, launch the cmdlet Import-ExchangeCertificate, absolutely not the MMC!

You need to install the .p7b file to intall the certificate and the entire certification chain not only the final certificate. It is the "installation overall file" of the delivery email. It is also available on your status page in the "See the certificate" section (PKCS7 format).

2- Importation

Import-ExchangeCertificate -Path c:\p7-0123456789-12345.p7b | Enable-ExchangeCertificate -Services "SMTP, IMAP, POP, IIS"

See also:

• http://technet.microsoft.com/en-us/library/bb124424.aspx
• http://technet.microsoft.com/en-us/library/aa997231.aspx
• Install intermediary certificates or root certificate manually

To use Exchange 2007 with ISA 2006, see here:
http://www.shudnow.net/2007/07/15/publishing-exchange-2007-autodisover-in-isa-2006/