Why can't I fix some of the synchronization errors before going offline?
Not all errors can be fixed. For example, if a parent account has been deleted from Microsoft Dynamics CRM Online while you were offline. For these type of errors, delete the records, try to synchronize again, and then re-enter the data manually into Microsoft Dynamics CRM Online, while online. Some data may required changes.
Appointments and service activities do not have access to scheduling information and may cause scheduling conflicts. These conflicts can be resolved by rescheduling or updating the schedule after going back online.