We've all been there, a user calls the helpdesk saying that their blackberry isn't syncing emails properly. One solution is to wipe the blackberry and setup enterprise activation again but depending on the user and size of their mailbox this can be a long process so here are a few hints that I've picked up from various blackberry forums.

First thing to do is actually make sure that the Blackberry is not receiving emails. You could send the person an email and then ask them if they got it but there is an easier way. In the subject of the email make sure it starts with and the blackberry will automatically send you a return receipt as soon as the message syncs to the device.

If the address book is not syncing correctly you can easily force the blackberry to erase the current contents of the address book and then download everything again from the server. To do this go to the Address Book application and then go to the Options menu. In the Options menu type RSET. You will be prompted to do the wipe and download, it may take a few minutes depending on how many entries in the users address book.

If the problem is the calendar then you can use the exact same trick as above. Go to the calendar application and then go to it's options menu and type RSET and it will wipe the calendar and redownload it from the server.

If the issue is syncing of eMail then you can go to the Settings -> Advanced Settings -> Enterprise Activation menu and hold down ATL while typing CNFG. This will bring up a hidden menu where one of the options is to disable 'Wireless Sync'. Set it to disabled and exit all the way back to the blackberry home screen and then drill back to that menu again and then set 'Wireless Sync' to enabled. When you exit the menu again a short Enterprise Activation will kick in and hopefully once it's finished the blackberry will be syncing it's eMail, Calendar and Address book again with no problems.