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We are getting ready to migrate from Exchange 2000 (svrexchange) to Kerio Mail Server 6.7 (svrkerio). The plan we've sketched is based on ( In our case, the primary server would be svrexchange and svrkerio the secondary. Using this method we'll have more control over the migration and will allow us to tackle problems that may arise. Also, handover should be smooth, quick, and simple.


-Websense Email Security
-Routes mail between internet and mail servers

-Microsoft Exchange 2000 on Windows 2000
-Old mail server for

-Kerio Mail Server 6.7 on Ubuntu 9.10 Server
-New mail server for

-Primary domain controller on Windows 2003 Server
-Provides directory services and authentication to mail servers

5. DNS MX -> svrexchange -> svrkerio


1. Install and configure KMS.
2. Add DNS MX entry for KMS (
3. Run both servers in parallel to migrate users on small groups (10 users per group).
4. For each user group
(a) Migrate users to Kerio using the migration tool
(b) Add user aliases on Kerio
(c) Add forwarding on svrexchange to each user account to the user's alias address in svrkerio ( -> user<_at_> )
(d) Move messages in Outlook PST files to svrkerio

5. When all users have been migrated, svrkerio is reconfigured as the primary mail server in the DNS MX and on svrwes. Then svrexchange is retired.


Exchange 2000 only allows forwarding to addresses in the directory it points to. Are mail aliases created in Kerio displayed on Exchange 2k's address list so proper forwarding can be configured? If not, there's the possibility to add contacts with those aliases to which we can set forwarding to, but then it takes some additional time to create them and later delete them, so this is something we'd like to avoid.

Is this the best course of action for migrating from Exchange 2000?

[Updated on: Wed, 27 January 2010 19:57]


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Yes, that's actually part of the implementation section above (4-a).
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