[There's a reason that Yoda is the unofficial mascot of SBS.  Size indeed matters not.] AutoDiscover and DNS - THE OFFICIAL BLOG OF THE SBS "DIVA"
Thu, Dec 18 2008 23:36 bradley

AutoDiscover and DNS

Microsoft Exchange Server Remote Connectivity Analyzer:
https://www.testexchangeconnectivity.com/

Do you know about the Exchange connectivity test tool?  This site allows you to test various Exchange settings.  One of them having to do with the Outlook autodiscover.

Before using it, set up a test user account and put in those credentials for the test...

Passwords gathered using this tool are not stored by the server.  Passwords are encrypted in memory inside of the user's browser using a key only known to this server.  When passwords are transmitted to the server, they are encrypted using the server key and only transmitted to the server over a Secure Sockets Layer (SSL) connection.  As always however, it is recommend that you use a disposable test account for any testing done over the Internet.

https://domain.com/AutoDiscover/AutoDiscover.xml
https://autodiscover.domain.com/AutoDiscover/AutoDiscover.xml
Http Redirect Check to http://autodiscover.domain.com/AutoDiscover/AutoDiscover.xml
DNS SRV lookup for _autodiscover._tcp.domain.com

If you choose to manage the domain name yourself, you must add the DNS resource records that are listed in the following table.

Note
The settings in this table assume that you choose “remote” as the host prefix for your server. You can customize the host prefix within the Internet Address Management Wizard. The table references the domain contoso.com as an example. Replace instances of contoso.com with the domain name that you purchased.

Resource Record NameRecord TypeRecord SettingDescription
Remote
A
Static IP address of the Wide Area Network (WAN) side of your router or firewall
Maps your domain name to the WAN IP address (provided by your Internet service provider (ISP)) of the router or software firewall that helps protect your network from the Internet. Microsoft recommends that you lease a static IP address from your ISP.
MX
Alias (CNAME)
Remote.contoso.com
Provides e-mail message routing for e-mail@contoso.com to arrive at your Windows SBS 2008 mailboxes.
SPF
TXT
v=spf1 a mx ~all
Resource record that helps prevent e-mail sent from your server being identified as spam.
Note
Some domain name providers offer SPF building tools that you can use.
_autodiscover._tcp
SRV
Service: _autodiscover
Protocol: _tcp
Priority: 0
Weight: 0
Port: 443
Target host: remote.contoso.com
Enables Office Outlook 2007 with Service Pack 1 and Windows Mobile 6.1 e-mail clients to automatically detect and configure Outlook Anywhere (RPC over HTTP).

For information about how to add DNS records to your server, open Windows Help and Support, and then search for the topic “Add a Resource Record to a Zone.”

Contact your domain name provider and ask them to help you configure the domain name records properly.

All of these settings are ones you have your ISP do where your domain name is parked.  You don't do them on your SBS 2008 box.  Here's what a wizard driven GoDaddy domain looks like:

See that _autodiscover in the SRV section?  That's what you need to do to ensure that autodiscover works as it should.

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# re: AutoDiscover and DNS

Saturday, December 20, 2008 8:48 AM by Pedro R

Hi Susan

My question to you is: can we setup the _autodicover SRV entry on our SBS2003 networks as well?

In doing this I'm assuming Outlook 2007 SP1 and WM 6.1 will also automatically configure themselves right?

thanks and merry christmas!