The cs5migrate utility is used to migrate the Calendar Server 5.1.1 databases to Calendar Server 6.3 level. In addition, run this utility if you are migrating from one of the earlier Calendar Server 6 versions, and you did not use the recurring option.
The cs5migrate utility performs the following tasks:
In the past, if you did not plan to use the Connector for Microsoft Outlook, you could choose to run this utility without doing the recurring data conversion. However, starting with Calendar Server 6.3, you must convert your recurring data to the new format.
This utility can be found in the sbin directory along with other administrative tools, after you have upgraded to Calendar Server 6.3 software.