You are moving to Dynamics CRM from a lesser CRM application (let’s call it Salesforce.com, but could be any other CRM). As part of the migration, you are importing legacy appointment records into Dynamics CRM and assigning them to their respective users in Dynamics CRM.
When you go live, if you use the standard Appointment synchronization rule with either Outlook Sync or Server Sync, these appointments will synchronize to the user’s Exchange calendar, and the user may be surprised to find that she has hundreds of reminders pop up when she logs in to Outlook.
If you are importing historical activities, one way to prevent this reminder overload is to modify the user’s synchronization filter for appointments to only synchronize appointments that occur near or after the go-live date. Pick a date shortly before the go-live date, such as the day before the users will start using CRM. Change the first line in the filter from Start Date Contains Data to Start Date on or after [desired start date].