How to create an Autodiscover DNS entry
Some of the Outlook features such as the Out of Office Assistant and the ability to share tasks rely on the Autodiscover service. You also need this record if you are using Outlook 2016.
To allow these features to function correctly you must create a DNS SRV record where your domain is hosted. You must edit the domain that is used on the Hosted Exchange service.
Typically you can edit the DNS entry in cPanel, Plesk etc. If you are unsure on how to do this please contact your domain host for assistance.
The SRV record should be setup in with the following details.
Replace outlook.myexchangedomain.com with your proxy setting from your welcome email.
Please note you must delete any 'A' records with the autodiscover attribute set as this will overide the SRV record and cause the connections to fail.