In order to allow smartphones and e-mail clients (Outlook 2007, 2010, and 2013 in particular) to automatically configure the necessary Exchange server address and settings, an Autodiscovery SRV record needs to be created. If you use cPanel to host your domain name & DNS settings, then you can follow these directions to add an Autodiscovery SRV record into the DNS management in WHM.
1. Log into WHM.
2. Click on DNS Functions then find the domain you want to edit and click Edit.
3. Where it says Add New Entries, enter the following into the first text box:
_autodiscover._tcp
4. You can modify the TTL on the record if you want, or leave it at the default 14400 seconds.
5. Where it says Select choose SRV.
6. Where it says Priority enter:
10
7. Where it says Weight enter:
10
8. Where it says Port enter:
443
9. Where it says hostname enter the external FQDN of your exchange serve
r:
remote.somedomain.com.
(don't forget the period at the end of the hostname)
10. Click Save button at bottom.
11. Use Microsoft's Exchange Autodiscovery tool to check your work:
https://testconnectivity.microsoft.com/
For more info: https://www.thirdtier.net/2009/02/setting-up-an-external-autodiscover-record-for-sbs-2008/
