So we got a request for a Kerio Connect to Office 365 calendar migration from someone who we discovered was an old pal from the early days of group scheduling.
How could we say no?
So we've got that under development now -- anyone else interested in testing it out please drop us a line.
We've got full-state calendar migrations going, as well as contacts and tasks.
Notes become tasks (because Microsoft's EWS API does not allow us to create Notes).
A few of the recurrence patterns do not transfer to Office 365 so we insert them and flag them as problem children. Biggest example: Last weekday or weekend day of the month is supported on Kerio but not in Office 365.
Of course we include our UNDO functionality for testing and remediation.