This article may interest you, if after installing Office 2010 SP1 you do not get reminders for your appointments anymore and also when you flag an item for follow-up the item will be marked as completed and the flagged items will not show in the To-Do Bar.
The cause of this issue was due to a fix that was included in the Microsoft Office 2010 SP1 release.
To resolve this issue, head over to Microsoft KB2588842, download and apply the hotfix included in the August update for Office 2010.
The Outlook update needed to resolve this issue is available at Microsoft KB2584053
This fix applies to Microsoft Dynamics CRM 2011 & Office 2010 Service Pack 1
Windows Info Portal 