Autodiscover Exchange 2010

There are 4 ways of implementing Autodiscover for Exchange 2010:

1. Set the SCP to the url of the autodiscover server
2. DNS/HTTP redirection
   • the client's application looks for the autodiscover method
   • if it detects that the DNS/HTTP redirection is used (because trying previous methods didn't work)
   • the domain suffix ot the email address is extracted : "domain.com"
   • the client checks to which host "autodiscover.domain.com" is resolving
   • a DNS CNAME record is in place. it resolves "autodiscover.domain.com" to "autodiscover.otherdomain.com".
   • a DNS A record is in place. it resolves "autodiscover.otherdomain.com" to an IP address
   • the client checks if port 80 on the resolved IP is open and listening.
   • the client requests the url "http://autodiscover.otherdomain.com/autodiscover" and is redirected by IIS to HTTPS: https://autodiscover.otherdomain.com/autodiscover/autodiscover.xml
3. locally configured XML file
4. DNS SRV records (most used method for Autodiscovery)