Redirecting Email to Microsoft Exchange Online
After you finished migrating mailboxes to Microsoft Exchange Online, you may need to update the Mail Exchange (MX) records in your DNS so that all mail is redirected to the cloud. This step can only be performed after all on-premises mailboxes are migrated to Microsoft Exchange Online. Note that this step is mandatory only if you plan to completely decommission your on-premises Exchange infrastructure.
For information on how to do that, go to http://onlinehelp.microsoft.com/en-us/office365-enterprises/ff637598.aspx.
Updating Outlook Profiles
During migration, Migration Manager for Exchange switches mailboxes from the source Exchange server to Microsoft Office 365. Before users can start working with their new cloud mailboxes, their Microsoft Outlook profiles must also be updated. To update Outlook profiles you may use Client Profile Updating Utility (abbreviated to CPUU) shipped with Migration Manager. The utility allows you to update Outlook profiles automatically and transparently.
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Caution: You have to provide all users with their Microsoft Office 365 passwords before CPUU switches Outlook profiles. Otherwise, the user cannot log on to his or her mailbox and get an access to his/her emails after the switch. |
For information on how to update Outlook profiles using CPUU, see the Client Profile Updating Utility Administrator Guide included in the Migration Manager documentation set.
Decommissioning Exchange Servers (Optional)
After you successfully migrated all mailboxes from on-premises Exchange organization to Microsoft Office 365, ensured that all users can connect to their cloud mailboxes, and mail flow is established properly, you may start decommissioning your on-premises Exchange servers. Refer to Microsoft documentation for information on how to do that.
For information on how to decommission existing Exchange servers, go to http://technet.microsoft.com/en-us/library/cc463439(v=ws.10).aspx.
Switching to Other Directory Synchronization Tools (Optional)
Establishing co-existence of objects between Active Directory domain and Microsoft Office 365 using Migration Manager for Active Directory is supported only during calendar synchronization and mailbox migration. To continue synchronizing objects after you finished migrating mailboxes, consider using Microsoft Azure AD Connect (link).
