MS-203 - Microsoft 365 Messaging Hybrid Configuration and Migration Questions and Answers

Question 1

An organization is preparing for a remote move migration to Exchange Online. For the migration to succeed, Exchange Online needs to connect to an endpoint on the on-premises Exchange servers to pull mailbox data. Which service must be enabled on the on-premises Exchange Client Access servers to facilitate this?

Accepted Answer

The Mailbox Replication Service (MRS) Proxy

Answer

The Mailbox Replication Service (MRS) Proxy is the component that receives and processes remote move requests from Exchange Online. It must be enabled on the Exchange Web Services (EWS) virtual directory of the on-premises Client Access servers to allow the cloud-based MRS to connect and pull mailbox data.

Question 2

A messaging administrator has synced a migration batch of 50 mailboxes to Exchange Online. The status for the batch is 'Synced'. To finalize the migration and cut over the mailboxes so that users connect to their new Exchange Online mailbox, which PowerShell cmdlet must be run?

Accepted Answer

Complete-MigrationBatch

Answer

The `Complete-MigrationBatch` cmdlet is used to finalize a migration batch that has successfully finished its initial synchronization. This action performs a final incremental sync, configures the user's Outlook profile to point to the new cloud mailbox, and converts the source mailbox to a mail-enabled user.

Question 3

Which of the following is the primary purpose of the 'Organization Relationship' that is created by the Hybrid Configuration Wizard (HCW)?

Accepted Answer

To establish a trust that enables cross-premises free/busy lookups, calendar sharing, and MailTips.

Answer

The Organization Relationship establishes a federated trust between the on-premises Exchange organization and the Exchange Online organization. Its primary purpose is to facilitate the sharing of calendar free/busy information, MailTips, and message tracking between the two environments, providing a seamless experience for end-users.

Question 4

An administrator is running the Hybrid Configuration Wizard (HCW) to connect their on-premises Exchange organization to Exchange Online. They need to decide between 'Classic' and 'Modern' hybrid topology. What is the key advantage of choosing Modern Hybrid?

Accepted Answer

It does not require any inbound network connections from the internet to the on-premises Exchange servers.

Answer

Modern Hybrid uses the Hybrid Agent, which removes the requirement to publish on-premises Exchange Client Access Servers to the internet. The agent establishes an outbound connection to Exchange Online, simplifying the network and firewall configuration and enhancing security by not requiring inbound HTTPS connections for features like free/busy and mailbox moves.

Question 5

After running the Hybrid Configuration Wizard, a user with an on-premises mailbox reports they cannot see the free/busy information for a user whose mailbox is in Exchange Online. An administrator needs to verify the external connectivity for the on-premises services required for hybrid features. Which tool is most appropriate for this task?

Accepted Answer

Microsoft Remote Connectivity Analyzer (ExRCA)

Answer

The Microsoft Remote Connectivity Analyzer (ExRCA) is a web-based tool designed to test connectivity for various Exchange services from an external perspective, simulating how Microsoft 365 services connect. It includes specific tests for hybrid deployments that validate Autodiscover, Exchange Web Services (EWS), and other endpoints crucial for features like free/busy sharing.

Microsoft 365 Messaging (MS-203) Practice Test

Microsoft 365 Messaging (MS-203) Practice Test

MS-203 - Microsoft 365 Messaging Hybrid Configuration and Migration Questions and Answers