Microsoft 365 Messaging — Question 40

You have an on-premises Microsoft Exchange Server 2019 organization.
You plan to configure the environment to support a hybrid deployment.
You need to ensure that you can migrate mailboxes from the on-premises organization to Exchange Online.
Which two ports should be open between Exchange Online and the on-premises organization? Each correct answer presents part of the solution.
NOTE: Each correct selection is worth one point.

Answer options

• A. 25
• B. 80
• C. 143
• D. 389
• E. 443
• F. 993

Correct answer: A, E

Explanation

Ports 25 and 443 are essential for the hybrid configuration, as port 25 is used for SMTP mail flow and port 443 is necessary for secure HTTPS communication. The other ports, while important for different functions, are not required for the specific task of migrating mailboxes in a hybrid setup.