Migration tools must run on a host where 4D WebSTAR is installed. The tool locates 4D Mailbox server's configuration from the local file system and, therefore, it is necessary that it is used by a user with full access to the configuration.

Configuration files for all Post Offices are tested before the migration process starts. It is necessary that no configuration file is damaged or missing. Otherwise, an information will be displayed that the migration cannot be performed since the 4D Mail configuration cannot be located and the wizard exits.

It is necessary that the IMAP service is running at the 4D Mail.

It is necessary that users can login to the IMAP server and use a valid password for it.

Users with the password missing will not be migrated since they cannot be authenticated at the source IMAP server.

Kerio MailServer must be installed and running on the same computer as 4D WebSTAR or on a host which is accessible via network. If a firewall is running on the Kerio MailServer’s host, it is necessary to allow incoming connections on ports 44337 and 8143.

In Kerio MailServer, an administration account must be created during the installation.

Also a primary domain must be created in Kerio MailServer that does not exist in 4D Mail server. This measure will help avoid possible duplicities.