Enter Exchange Server Address (webmail.delval.edu)
Tap on Next to submit settings. Handset will check with server and verify if successful. If screen turns black (based on your display timeout setting), just tap the power button or Back hard key.
Select the Corporate Sync account you wish to modify.
Your Corporate Sync Exchange account settings will be displayed
Verify the items you want synced are checked.
Click on arrow underneath "Sync messages for" to select how far back you will pull / sync messages from your corporate exchange account. (1 day, 3days, 1 week, 2 weeks, 1 month, All)
Keep in mind if you have messages older than this setting, those email messages will not sync over.