Why are some calendar events migrated to the primary Google calendar and not the original calendar? BitTitan Triage May 05, 2019 19:02 Updated Follow Why are some calendar events migrated to the primary Google calendar and not the original calendar? Answer:On the Google calendar, if the calendar event is not organized by the mailbox owner, that event can only be created on the primary calendar. Related articles What are exceptions to recurring calendar meetings, and are they migrated? Introduction: Migrating Calendars What is the difference between Google calendar reminders and Google calendar notifications? Are they migrated? Set the Time Zone for Mailbox Migration Destinations How do I migrate calendars from Google to Office 365 with color? Comments 0 comments Please sign in to leave a comment.