Using DNS_ALL fails on some domains where DNS_ANY works.
When you add your domain to Office 365, typically your domain's MX record is updated (by you or Office 365) to point to Office 365, and ALL email sent to that domain will start coming to Office 365.
Make sure you've created mailboxes in Office 365 for everyone who has email on your domain BEFORE you change the MX record.
For purposes of this lab, I will be showing you how to all DNS records via Windows DNS.
The first thing we will want to configure is an A record. This A record will be pointing to the Public IP Address of the service that is accepting your mail.
There's a comment below from 7 years ago regarding BSD and Mac OSX, I'd just like to follow up incase some people see that and don't think it'll work on Mac OSX.
Contributors: Check the Domains FAQ if you don't find what you're looking for.
There are a couple benefits of utilizing these hosted mail hygiene services.
These include: In our zone, let’s go ahead and create an A record for smtp.that points to .40.
1) In the IP Address (A records) section, click on the Edit A Records button a) To remove and replace existing Numeric IP addresses you first must select the box next to each A record you need to Delete and click Continue.