Knowledgebase: Google
Google Sync and Notifylink on Blackberry being used at the same time
Posted by Matt Kuebler on 09 November 2009 10:05 AM

Google:

You cannot run Google Sync for calendar and NotifyLink for calendar synchronization at the same time on your Blackberry.  If you do, you will run into duplication issues with the appointments.

If you are going to use NotifyLink to wirelessly synchronize your Google calendar, it is recommended that you disable/remove Google Sync.