Microsoft MS-203 Dumps
| Exam Code | MS-203 |
| Exam Name | Microsoft 365 Messaging |
| Update Date | 18 Jul, 2026 |
| Total Questions | 394 Questions Answers With Explanation |
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Question # 1
You have a Microsoft Exchange Server 2019 organization. You create a retention policy. You need to ensure that all email older than one year is moved to an archive mailbox. What should you use?
A. a data loss prevention (DLP) policy
B. a retention policy tag
C. a default policy tag
D. a personal tag
Question # 2
You have hybrid deployment between a Microsoft Exchange Online tenant and an onpremises 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: From Azure AD Connect, select Exchange Mail Public Folders. Does this meet the goal?
A. Yes
B. No
Question # 3
You have a hybrid deployment between a Microsoft Exchange Online tenant and an onpremises 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. Inbound SMTP Email
B. Outbound SMTP Email
C. Message Analyzer
D. Exchange Online Custom Domains DNS Connectivity Test
Question # 4
You have a hybrid deployment between a Microsoft Exchange Online tenant and an onpremises 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. Return the Hybrid Configuration wizard
B. Restart the MSExchangeTransport service.
C. Recreate the certificate and include an exportable private key.
D. Bind a self-signed certificate to the SMTP protocol.
Question # 5
You have a hybrid deployment between a Microsoft Exchange Online tenant and an Exchange Server 2019 organization. You need to enable journaling for outbound email. Where can you store the journal reports?
A. a mail-enabled public folder
B. an Exchange Server 2019 mailbox
C. a Microsoft SharePoint Online document library
D. an Exchange Online mailbox
Question # 6
You have a Microsoft Exchange Online tenant that contains an email domain named contoso.com. You have a partner organization that uses an email domain named fabrikam.com. You plan to add a connector to secure the email messages sent from fabrikam.com to contoso.com. You need to ensure that only fabrikam.com can use the connector. What should you do?
A. Configure the connector to verify the contoso.com domain with a certificate.
B. Configure the connector to verify the fabrikam.com domain with a certificate.
C. Add fabrikam.com as a remote domain.
D. Add fabrikam.com as an accepted domain.
Question # 7
You have a Microsoft Exchange Online tenant that contains a custom role group named RGI. You need to prevent users assigned to RGI from running a specific cmdlet. Which cmdlet should you run to modify RG1?
A. Remove Entry
B. Remove -ManagementRoleAssignment
C. Set-ManagementScope
D. Disable -Cmd1etExtensionAgent
Question # 8
You have a hybrid deployment between a Microsoft Exchange Online tenant and an onpremises Exchange Server 2019 organization. Users report that emails sent from Exchange Online mailboxes to the on-premises Exchange Server mailboxes are undelivered. You need to review the non-delivery report (NDR) for each undelivered email. What should you use?
A. message trace in the Exchange admin center
B. auditing in the Exchange admin center
C. the SMTP protocol logs in Exchange Server
D. the transport logs in Exchange Server
Question # 9
You have a Microsoft Exchange Online tenant. Users report that legitimate email messages are delivered to their Junk Email folder. You plan to use the Microsoft Remote Connectivity Analyzer to identify the cause of the issue. Which test should you run?
A. Outlook Connectivity
B. Inbound SMTP Email
C. Outbound SMTP Email
D. Message Analyzer
Question # 10
You have a Microsoft Exchange Online tenant. You plan to place a hold on all email messages stored in the mailbox of a user named User1. What should you create first?
A. an eDiscovery case
B. sensitive info type
C. a data loss prevention (DLP) policy
D. an information barrier segment
Question # 11
You have a Microsoft Exchange Online tenant that uses Microsoft Defender for Office 365. You need to create a new Safe Attachments policy named Policy1 that meets the following requirements: Immediately delivers email messages that contain attachments and replaces the attachments with placeholders Reattaches the attachments after scanning is complete Quarantines malicious attachments Which action should you select for Policy1?
A. Monitor
B. Block
C. Dynamic Delivery
D. Replace
Question # 12
You have a Microsoft Exchange Online tenant that uses an email domain named contoso.corn. An in-caning email messages route through an third-party filtering service named Filter1 to connector named Connector'. You discover that incoming messages contain headers that specify the source IP address as Filter1. You to ensure that incoming email messages contain headers that specify source IP address of the original sender. The solution must prevent any charges to the service. What should you do?
A. From Microsoft 365 Defender portal configure enhanced filtering for Connector1.
B. Configure Connector' to authenticate messages by using the IP address of Filter' service.
C. Configure the MX Of contoso.com to point to contoso-can.mailgotection.outbok.com.
D. From the Exchange admin center. create a transport rule to rewrite header for incoming messages.
Question # 13
You have hybrid deployment between a Microsoft Exchange Onlne tenant and an onpremises Exchange Server 2019 organization. The deployment uses Azure AD Connect. All incoming email is delivered to Exchange Online. You have 10 mail-enabled publich 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: From Exchange Online, Create a mail contact for each mail-enabled public folder. Does this meet the goal?
A. Yes
B. No
Question # 14
You have a Microsoft Exchange Online tenant that contains a group named Group1. The members of Group1 need to create user mailboxes. The solution must use the principle of least privilege. To which role group should you add Group1?
A. Recipient Management
B. Security Operator
C. Help Desk
D. Organization Management
Question # 15
You have a hybrid deployment between a Microsoft Exchange Online tenant and an onpremises Exchange Server 2019 organization. Users report that email messages between the Exchange Server organization and the Exchange Online tenant are undelivered. You install and enable a new certificate from a different trusted certification authority (CA). You need to ensure that mail flow between Exchange Server and Exchange Online is restored. Which two PowerShell cmdlets should you run? Each correct answer presents part of the solution. NOTE: Each correct selection is worth one point.
A. Set-SendConnector
B. Set-IntraOrganirationConnector
C. Update-Hybridconfiguration
D. Set-ReceiveConnector
Question # 16
You have a Microsoft Exchange Online tenant that contains a public folder named CustomerSupport. You need to access CustomerSupport by using Outlook on the web. Which section in Outlook on the web should you add CustomerSupport?
A. Favorites
B. Folders
C. Groups
Question # 17
Note: This question is part of a series of questions that present the same scenario. Each question in the series contains a unique solution that might meet the stated goals. Some question sets might have more than one correct solution, while others might not have a correct solution. 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 Microsoft Exchange Online tenant that contains 1,000 mailboxes. All the users in the sales department at your company are in a group named Sales. The company is implementing a new policy to restrict the use of email attachments for the users in the Sales group. You need to prevent all email messages that contain attachments from being delivered to the users in the Sales group. Solution: You create a mail flow rule. Does this meet the goal?
A. Yes
B. No
Question # 18
You have a Microsoft Exchange Online subscription for an email domain named contoso.com. A partner company has an Exchange Online subscription for an email domain named fabrikam.com. You need to prevent out-of-office messages sent by users in contoso.com from being sent to users in fabrikam.com. What is the best way to achieve the goal from the Exchange admin center? More than one answer choice may achieve the goal. (Choose the best answer.)
A. Create a connector
B. Create a mail flow rule
C. Create a remote domain
D. Create an accepted domain
Question # 19
You have a hybrid deployment between a Microsoft Exchange Online tenant and onpremises Exchange Server 2019 organization. The on-premises organization contains several Exchange Server 2019 servers. You discover that delivery fails for all email messages sent from the on-premises organization to Microsoft 365. You discover that the certificate for an on-premises Exchange server expired. You need to resolve the issue as quickly possible. The solution must minimize administrative effort. What should you do on the on-premises Exchange server?
A. Create a new self-signed certificate.
B. Generate a certificate renewal request.
C. Generate a certificate request.
D. Add the certificate for a new root certification authority (CA).
Question # 20
You have a Microsoft Exchange Online tenant. You need to perform an In-Place eDiscovery search. The solution must meet the following requirements: Minimize administrative effort. Search both public folders and mailboxes. Use an In-Place Hold to place the search results on hold. What should you do in the Microsoft 365 compliance center?
A. Search the public folders and the mailboxes in a single search, and then place the results on In-Place Hold.
B. Search the public folders first, and then place the results on In-Place Hold. Search the mailboxes second, and then place the results on In-Place Hold.
C. Search the public folders and the mailboxes in a single search. Once the search completes, place only the mailboxes that contain results and the public folders on In-Place Hold.
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