Zimbra Collaboration Suite 7.0
Zimbra Collaboration Suite 7.0
iCalendar Migration Guide


Zimbra iCalendar Migration > About Zimbra iCalendar Migration Tool

About Zimbra iCalendar Migration Tool
The Zimbra iCalendar Migration Tool converts Oracle Calendar Server (OCS) generated .ics files into standard .ics format.
The Zimbra iCalendar Migration Tool begins the conversion by identifying patterns within RDATE series. Any patterns of DAILY, WEEKLY and MONTHLY recurrences within RDATE series are converted to an RRULE. In the case of recurrences that happen on a specific day of the week, a BYDAY is also added to the RRULE. Any recurrences with limited changes in summary, attendee list, location, date, time, or description are converted to exceptions.
By default, all RDATE series that do not fit a pattern are converted into standalone events with new UIDs. Alternately, the icalmig tool can be run with an option to convert all RDATE series that do not fit a pattern to an RRULE with a YEARLY recurrence, with exceptions are created for each associated occurrence.
The Zimbra iCalendar Migration Tool is run using the icalmig command in the Command Line Interface (CLI). The icalmig command can be run in standard mode, or with additional options to further control the conversion process. Standard mode converts a file to standard RFC format, using only default and standard options during conversion. Syntax, description, and examples for icalmig are given below.