I have an Exchange account at work, but my data is not being downloaded to my device
Check with your system administrator to obtain or verify the name of the mail server that offers you wireless access to the corporate mail system. If you cannot obtain the name of this server (some companies do not give it out because they do not want wireless access to their servers), you cannot synchronize with your Exchange account.
If your company requires you to change your password for accessing your Exchange account, you must change the password on your device (see Change account login settings).
I entered the settings to sync with Exchange, but I can’t synchronize with my company’s Exchange server
Check with your system administrator to find out if a systemwide locking policy is in place.
A notification tells me that ActiveSync encountered a problem on the server
There is a temporary problem with the server, or the server may be temporarily overloaded. Try again later, and if the problem persists, contact your system administrator.
A notification tells me that there is not enough free memory to synchronize
1Press Center 
to display Card view.
2Scroll through the cards and note how many applications are open.
3Close any application you are not using by throwing its card off the top of the screen.
If the problem persists, see Making room on your device for other suggestions.
A notification tells me that the server could not be reached
Make sure your device is connected to a
If you have a network connection and receive this notification, it means your device had to wait too long to connect to the Exchange server. The connection may have been lost, the server may be temporarily overloaded, or the server may have encountered an internal error. Check your Exchange server name and proxy server settings (see Set up email: Microsoft Exchange and Lotus Notes), and try again later.
A notification tells me that ActiveSync encountered a problem with [item type] [item name]
There was an error while synchronizing a single item. This error can usually be corrected only by deleting the item that caused the error. If you sync again to see if the error persists, be aware that items causing this type of error are skipped and do not show up again.
I have problems using my account
Occasionally you may experience problems using an email account after you set it up. If you followed the account setup procedure (see Set up email) and are experiencing problems using the account, verify that the account complies with your email provider’s requirements:
•Verify both your password and your username for your email account.
Chapter 15 : Troubleshooting 179