MS-203 - Microsoft 365 Messaging Hybrid Configuration and Migration Questions and Answers — 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?
- The Autodiscover Publishing Service
- The Mailbox Replication Service (MRS) Proxy (Correct answer)
- The Unified Messaging Call Router
- The POP3 Backend Service
Correct answer: The Mailbox Replication Service (MRS) Proxy
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?
- Start-MigrationBatch
- Set-MigrationBatch -Finalize
- Resume-MigrationBatch
- Complete-MigrationBatch (Correct answer)
Correct answer: Complete-MigrationBatch
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)?
- To synchronize directory objects from on-premises Active Directory to Microsoft Entra ID.
- To configure Send and Receive connectors for mail flow between on-premises and Exchange Online.
- To establish a trust that enables cross-premises free/busy lookups, calendar sharing, and MailTips. (Correct answer)
- To enable single sign-on (SSO) for users accessing both on-premises and cloud resources.
Correct answer: To establish a trust that enables cross-premises free/busy lookups, calendar sharing, and MailTips.
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?
- It supports integration with third-party identity providers.
- It does not require any inbound network connections from the internet to the on-premises Exchange servers. (Correct answer)
- It provides more granular control over mail flow routing.
- It is the only option that supports public folder migration.
Correct answer: It does not require any inbound network connections from the internet to the on-premises Exchange servers.
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?
- Azure AD Connect Health portal
- The `Test-NetConnection` PowerShell cmdlet
- Microsoft Remote Connectivity Analyzer (ExRCA) (Correct answer)
- Exchange Admin Center Message Trace
Correct answer: Microsoft Remote Connectivity Analyzer (ExRCA)
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.
Question 6: An organization with an on-premises Exchange Server 2013 environment wants to configure a hybrid deployment to migrate mailboxes to Microsoft 365. According to Microsoft's prerequisites, what is the minimum required update level for the Exchange 2013 servers?
- Service Pack 1 (SP1)
- The latest Cumulative Update (CU) (Correct answer)
- Any Cumulative Update released within the last two years
- Rollup Update 8
Correct answer: The latest Cumulative Update (CU)
Microsoft's official prerequisite for configuring a hybrid deployment is that the on-premises Exchange servers must be running the latest available Cumulative Update (CU). While the immediately previous release is sometimes supported for flexibility, the strong recommendation and requirement is to be on the latest CU to ensure compatibility, security, and access to all features.
MS-203 - Microsoft 365 Messaging Hybrid Configuration and Migration Questions and Answers
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?