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Can You Change a Microsoft 365 Remote Routing Address? | Exchange Hybrid
Question details
The user wants to know if it is possible or necessary to manually modify the remote routing address in a Microsoft 365 hybrid environment.
- Product
- Microsoft 365 / Exchange Server
- Device & OS
- not provided
- Scenario
- Updating user information such as surname, aliases, or primary SMTP address in a hybrid Exchange setup.
- Observed behavior
- The remote routing address is automatically generated on the server side, leaving administrators unsure if manual modifications are required for proper mail flow.
Ensure you have the necessary Exchange administrator permissions and understand that the remote routing address is critical for automatic mail flow routing between your on-premises servers and the cloud.
Rely on Automatic Exchange Calculation
Allow the hybrid Exchange environment to automatically calculate the remote routing address instead of attempting manual modifications.
In a hybrid Microsoft 365 environment, the remote routing address generally cannot and should not be modified manually. It is automatically generated on the server side to ensure seamless mail flow.
Modify the user's surname, primary SMTP address, or aliases as you normally would within your on-premises Exchange admin center.
Wait for the directory synchronization to occur. The remote routing address will automatically adjust and recalculate for hybrid mail flow without any manual intervention.
Review the Set-RemoteMailbox Configuration
Use PowerShell to review the RemoteRoutingAddress parameter if you suspect mail flow configuration issues.
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Frequently Asked Questions
What is a remote routing address in Microsoft 365?
The remote routing address is the SMTP address of the mailbox in the cloud service associated with an on-premises mail user. It is used to securely route emails between the on-premises Exchange organization and Microsoft 365 in a hybrid setup.
Do I need to change the remote routing address if a user's name changes?
No. The remote routing address is calculated automatically by the server. It normally does not need to be manually changed when updating a user's surname, primary SMTP address, or aliases.
Can I manually modify the remote routing address in PowerShell?
Generally, the remote routing address cannot be manually modified. It is automatically generated on the server side to maintain the integrity of hybrid mail flow configurations.
