Overview

Customers seeking to migrate data (Email, Calendar, Contacts, etc.) from Exchange Online/O365 to Kerio Connect for multiple users (250+ per server) often face challenges. Manual methods like using .PST files or IMAP migration tools may not be feasible due to the large number of users. The Kerio Exchange Migration Tool (KEMT) may not be suitable as it only works for on-premises Exchange Server. This article provides a solution for this migration process, including the use of third-party tools.

Solution

To migrate data from Exchange Online/O365 to Kerio Connect for multiple users, you can use the Kerio IMAP Migration Tool. Follow these steps:

1. Prepare a CSV file with the list of users and their passwords. This information is crucial for access to the source IMAP server.
2. Ensure that the data on the source IMAP server does not change during or after the migration process. To prevent this, direct users and new emails to the Kerio Connect server before starting the migration.
3. Public and Archive folders cannot be migrated using the standard procedure. If you need to migrate these folders, move them to the mailbox of any user to migrate them as private folders.
4. On your source server, enable clear-text authentication. You would need to disable modern authentication so that basic/clear-text authentication can be used by Kerio Connect, based on the credentials in the CSV file.
5. Start the migration process. If you need to interrupt the migration process, delete the partially migrated user in Kerio Connect to prevent data duplication. Another option could be to migrate only a batch of users at a time.
6. When the migration is complete, it is strongly recommended that users create new accounts or profiles in their email clients, to avoid data inconsistency.

If you face any issues, you can collect the logs stored within the KIMT installation folder in `\logs\MMDDYYYY_HHMMSS`, and contact support for investigation.

Alternatively, you can export the emails from Exchange as .PST files per mailbox and import the PST files into Kerio Connect via Outlook.

Third-party services that assist with email migration, such as Migrationwiz and Transend Migrate, can also be considered.

Summary

This article provides a solution for migrating data from Exchange Online/O365 to Kerio Connect for multiple users using the Kerio IMAP Migration Tool, .PST files, or third-party services.

FAQ

1. Can I migrate public and archive folders using the Kerio IMAP Migration Tool?
   No, these folders cannot be migrated using the standard procedure. You need to move them to the mailbox of any user to migrate them as private folders.
2. What should I do if I need to interrupt the migration process?
   Delete the partially migrated user in Kerio Connect to prevent data duplication. Another option could be to migrate only a batch of users at a time.
3. Are there any third-party services that can assist with the migration?
   Yes, services such as Migrationwiz and Transend Migrate can assist with email migration.