View source for IMAP Migration to Exchange Online

[[Main Page|Home]] > [[Windows]] > [[Microsoft Exchange Server]] > [[IMAP Migration to Exchange Online]]

== IMAP Migration to Exchange Online ==

This document explains the step-by-step process to migrate mailboxes from a remote IMAP server to Exchange Online using the Exchange Admin Center.

=== Prerequisites ===
* Admin access to the Microsoft 365 tenant.
* IMAP server credentials and server details.
* A properly formatted CSV file with user mappings.

=== Migration Procedure ===

==== 1. Log In to the Exchange Admin Center ====
* Go to: https://admin.cloud.microsoft.com
* Sign in as an administrator.
* In the left navigation pane, click '''Exchange''' to open the Exchange Admin Center.

==== 2. Start a New Migration Batch ====
* From the Exchange Admin Center, select '''Migration'''.
* Click '''Add migration batch''' to create a new migration.

==== 3. Configure Batch Settings ====
* Enter a unique '''Name''' for the migration batch.
* From the dropdown menu, select '''Migration to Exchange Online'''.
* Click '''Next'''.

==== 4. Select Migration Type ====
* On the next screen, select '''IMAP migration'''.
* Click '''Next'''.

==== 5. Review IMAP Migration Prerequisites ====
* Carefully read the prerequisites and notes displayed.
* Click '''Next''' to continue.

==== 6. Set the Migration Endpoint ====
* Under '''Set migration endpoint''', click '''Create a new migration endpoint'''.
* Click '''Next'''.

==== 7. Configure the Migration Endpoint ====
* Enter a '''Name''' for the endpoint to identify it.
* Adjust the following settings as required:
** '''Maximum concurrent migrations'''
** '''Maximum concurrent incremental syncs'''
* Click '''Next'''.

==== 8. Enter IMAP Server Details ====
* Enter the '''FQDN''' or '''IP address''' of the remote IMAP server.
* Select the following options:
** Authentication method: '''Basic'''
** Encryption: '''SSL'''
** Port: '''993'''
* Click '''Next'''.

==== 9. Verify Endpoint Setup ====
* If the endpoint setup status shows '''Successful''', click '''Next''' to proceed.

==== 10. Upload the CSV File with User Mappings ====
* Download a sample CSV template by clicking '''Download a CSV file with headers and sample user information'''.
* Populate the CSV with:
** Target (Microsoft 365) email addresses.
** Source email addresses.
** Source passwords.
* Upload the completed CSV file using the '''Import CSV file''' option.
* Click '''Next'''.

==== 11. Select Configuration Settings ====
* In the '''Select configuration settings''' menu:
** Leave all options unselected if you wish to migrate the entire mailbox.
* Click '''Next'''.

==== 12. Schedule the Migration Batch ====
* Provide the email address where you want to receive migration status notifications.
* Select your preferred option for '''Start the migration batch by''' (either automatically or manually).
* Click '''Save'''.

==== 13. Complete the Migration Batch Creation ====
* Once the batch creation completes successfully, a confirmation message will appear.
* Click '''Done''' to finish the process.

== Notes ==
* You can monitor the migration progress from the '''Migration''' dashboard in the Exchange Admin Center.
* After migration completes, verify mailbox content and cut over DNS (MX) records if applicable.



[[Main Page|Home]] > [[Windows]] > [[Microsoft Exchange Server]] > [[IMAP Migration to Exchange Online]]