Determine whether the offline folders are being synchronized
To determine whether the offline folders are synchronizing correctly, follow these steps:
Right-click the folder that you want to verify, and then click Properties.
Click the Synchronization tab. If you do not see the Synchronization tab, you did not set up your profile to use offline folders.
Under Statistics for this folder, verify the settings in the following fields:
Last Synchronized on: Date
Server folder contains:# Items
Offline folder contains:# Items
If synchronization is working correctly, the number of items in the Server folder contains field and in the Offline folder contains field are the same. If synchronization is not working correctly, or if synchronization does not work correctly between the server folder and the offline folder, you must verify the profile settings. To do this, follow these steps, as appropriate for the version of Outlook that you are running.