What should you do next from Microsoft 365?

Your company has two offices. The offices are located in Seattle and New York. The company uses a third-party email system. You implement Microsoft 365. You move all the users in the Seattle office to Exchange Online. You configure Microsoft 365 to successfully

receive all the email messages sent to the Seattle office users. All the users in the New York office continue to use the third-party email system.

The users use the email domains shown in the following table.

You need to ensure that all the email messages sent to the New York office users are delivered successfully. The solution must ensure that all the email messages for the users in both offices are routed through Microsoft 365.

You create the required DNS records and Send connectors.

What should you do next from Microsoft 365?
A . From Microsoft 365 admin center, set the default domain. From the Exchange admin center, create a transport rule for all the email messages sent to adatum.com.
B . From Microsoft 365 admin center, add the adatum.com domain. From the Exchange admin center, configure adatum.com as an internal relay domain.
C . From Microsoft 365 admin center, add the adatum.com domain. From the Exchange admin center, configure adatum.com as an authoritative domain.
D . From Microsoft 365 admin center, set the default domain. From the Exchange admin center, configure adatum.com as a remote domain.

View Answer

Answer: B

Explanation:

The first step is to configure Exchange Online to accept emails for the adatum.com domain. To do this, we add the domain in Microsoft 365. When you add your domain to Microsoft 365, it’s called an accepted domain.

The next step is to tell Exchange Online what to do with those emails. You need to configure the adatum.com domain as either an authoritative domain or an internal relay domain.

Authoritative domain means that the mailboxes for that domain are hosted in Office 365. In this question, the mailboxes for the adatum.com domain are hosted on the third-party email system. Therefore, we need to configure the adatum.com domain as an internal relay domain. For an internal relay domain, Exchange Online will receive the email for the adatum.com domain and then ‘relay’ (forward) the email on to the third-party email server.

References: https://docs.microsoft.com/en-us/exchange/mail-flow-best-practices/manage-accepted-domains/manage­accepted-domains