Exam Details

  • Exam Code
    :MS-203
  • Exam Name
    :Microsoft 365 Messaging
  • Certification
    :Microsoft Certifications
  • Vendor
    :Microsoft
  • Total Questions
    :462 Q&As
  • Last Updated
    :Mar 28, 2025

Microsoft Microsoft Certifications MS-203 Questions & Answers

  • Question 21:

    You have a hybrid deployment between a Microsoft Exchange Online tenant and an on-premises Exchange Server 2019 server.

    Users report that the email they send to external recipients is marked as spam.

    You need to validate the Reverse DNS and Sender ID data for the on-premises server.

    What should you use in the Microsoft Remote Connectivity Analyzer?

    A. Exchange Online Custom Domains DNS Connectivity Test

    B. Message Analyzer

    C. Inbound SMTP Email

    D. Outbound SMTP Email

  • Question 22:

    You have a hybrid deployment between a Microsoft Exchange Online tenant and an on-premises Exchange Server 2019 organization. The deployment contains an Exchange Server 2019 server named Server1.

    Server1 has a public certificate named Cert1 that is bound to the SMTP protocol. Cert1 will expire soon.

    You replace Cert1 with a new certificate named Cert2 from a different public certification authority (CA).

    After you replace the certificate, you discover that email delivery between Server1 and the Exchange Online tenant fails.

    You need to ensure that messages can be delivered successfully.

    What should you do on Server1?

    A. Recreate the certificate and include an exportable private key.

    B. Restart the MSExchangeTransport service.

    C. Rerun the Hybrid Configuration wizard.

    D. Bind a self-signed certificate to the SMTP protocol

  • Question 23:

    After you answer a question in this section, you will NOT be able to return to it. As a result, these questions will not appear in the review screen.

    You have a hybrid deployment between a Microsoft Exchange Online tenant and an on-premises Exchange Server 2019 organization. The deployment uses Azure AD Connect. All incoming email is delivered to Exchange Online.

    You have 10 mail-enabled public folders hosted on an on-premises Mailbox server.

    Customers receive an error when an email message is sent to a public folder.

    You need to ensure that all the mail-enabled public folders can receive email messages from the internet. The solution must ensure that messages can be delivered only to valid recipients.

    Solution: Run the Sync-MailPublicFolder.ps1 script.

    Does this meet the goal?

    A. Yes

    B. No

  • Question 24:

    You have a Microsoft 365 E5 subscription and an on premises Microsoft Exchange Server 2019 organization that contains the servers shown in the following table.

    You run the Hybrid Configuration wizard on EXCH1.

    After running the wizard, you discover that Outlook on the web redirection.

    You need to disable Outlook on the web redirection.

    What should you do?

    A. Run the Update-HybridConfiguration cmdlet.

    B. Reconfigure Azure AD Connect.

    C. Rerun the Hybrid Configuration wizard.

    D. Run the Set-HybridConfiguration cmdlet.

  • Question 25:

    You have a hybrid deployment that contains a Microsoft Exchange Online tenant and an on-premises Exchange Server 2019 server named Server1.

    Server1 uses a certificate from a third-party certification authority (CA). The certificate is enabled for the SMTP service.

    You replace the certificate with a new certificate.

    You discover that delivery fails for all email messages sent from Server1 to your Microsoft 365 tenant.

    You receive the following error message for all the queued email messages: “450 4.4.101 Proxy session setup failed on Frontend with 451 4.4.0 Primary target IP address responded with 451 5.7.3 STARTTLS is required to send mail.”

    You need to ensure that the messages are delivered successfully from Server1 to the Microsoft 365 tenant.

    What should you do?

    A. From Server1, enable a self-signed certificate for the SMTP service.

    B. From Server1, enable the new certificate for the IMAP4 service.

    C. From Server1, run the iisreset command.

    D. Run the Exchange Hybrid Configuration wizard.

  • Question 26:

    You have two servers named EXCH1 and EXCH2 that run Windows Server 2012 R2 and have Microsoft Exchange Server 2016 installed.

    You purchase a Microsoft 365 subscription. You plan to configure a hybrid deployment between an Exchange Online tenant and the on-premises Exchange Server organization.

    You need to identify the prerequisites to installing the Microsoft Hybrid Agent on EXCH1 and EXCH2.

    Which two prerequisites should you identify? Each correct answer presents part of the solution.

    NOTE: Each correct selection is worth one point.

    A. Enable TLS 1.2.

    B. Upgrade the operating system of EXCH1 and EXCH2 to Windows Server 2019.

    C. Enable Hybrid Modem Authentication (HMA).

    D. Allow outbound HTTPS connections to Microsoft Online Services.

  • Question 27:

    You have a hybrid deployment between a Microsoft Exchange Online tenant and an on-premises Exchange Server 2019 organization.

    In Exchange Online, you create a shared mailbox named Mailbox1.

    Users report that they cannot open Mailbox1 in Microsoft Outlook.

    You discover that there is no entry in the address list for Mailbox 1 in the Exchange Server organization.

    You need to create Mailbox1 on-premises and enable the mailbox for hybrid management

    Which PowerShell cmdlet should you run?

    A. Set-OnPremisesOrganization with the -OrganizationRelationship parameter

    B. Enable-Remotemailbox with the -Shared parameter

    C. New-Remotemailbox with the -Shared parameter

    D. Upgrade-HybridConfiguration with the -ForceUpgrade parameter

  • Question 28:

    You have 1,000 user accounts that are each licensed for Microsoft 365. Each user account has a Microsoft Exchange Online mailbox.

    Ten of the user accounts are configured as service accounts for applications. The applications send event notifications to the mailboxes of the service accounts by using SMTP. The developers of each application have delegated access to the mailbox of their respective application. You need to ensure that all the event notifications sent by the applications are retained in the service account mailboxes so that new developers can review older notifications. The developers must be able to view only the notifications for their

    respective application. The solution must minimize licensing costs. What should you do?

    A. Convert the service account mailboxes into shared mailboxes.

    B. Replace the service account mailboxes with a mail-enabled group.

    C. Convert the service account mailboxes into mail-enabled contacts.

    D. Convert the service account mailboxes into mail-enabled users.

  • Question 29:

    You have a Microsoft 365 subscription that contains a user named User1.

    You need to ensure that User1 can only manage eDiscovery cases that she creates and export the search results. The solution must use the principle of least privilege.

    To which role should you add User1?

    A. Communications Compliance

    B. Compliance Administrator

    C. eDiscovery Manager

    D. eDiscovery Administrator

  • Question 30:

    You have a Microsoft Exchange Online tenant.

    You create a connector to a partner company named Contoso as shown in the following exhibit.

    You need to ensure that email messages containing the word Confidential and sent to contoso.com recipients are sent by using the TLS to Contoso connector. What should you do?

    A. Create a data loss prevention (DLP) policy.

    B. Configure a new rule.

    C. Configure Organization Sharing.

    D. Add contoso.com as a remote domain.

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