I know with Apache if you have an SSL certificate with an encrypted private key, you need to enter a passphrase whenever you restart the server in order to decrypt it and load the key/certificate. (Or you used to, at least.)
Does a similar thing happen on Windows with ISA/IIS and the built-in certificate store? Or, when you import a certificate does that obviate the need for entering the passphrase all the time? Does it ask when you reboot, restart IIS, etc.?
I'm trying to determine how impactful it will be and/or if I should decrypt the key...