Below are a few quick steps to try if Entourage stops behaving properly (e.g. fails to sync, creates duplicate items, etc). This is by no means an exhaustive list, but will resolve a large number of issues.
- Update Office: There have been a number of updates for Office that address a number of performance issues. Using the automatic update feature in Office ensure you’re fully up to date.
- Reset Cache: In Entourage, right click on your account name in the Folder List on left column. Select Properties and then click the “Empty Cache” This will remove all items from Entourage and it will resync with the server from scratch.
- Rebuild Database: Hold Option Key while starting Entourage. Run database repair utility.