If she has an exchange server then her email would not be google, yahoo, aol, etc. I bet they are using cached mode within exchange. Enable / Disable Cached Exchange Mode:
Note: Cached Exchange Mode creates a self-synchronized copy of your messages that are stored on both the server and your client.
On the Tools menu, select E-Mail Accounts.
You will now see the E-Mail Accounts Wizard window. Select "View or change existing e-mail accounts" and click Next.
The E-Mail Accounts window will now appear. Select Microsoft Exchange Server and click the Change button.
The Exchange Server Settings window will now appear. Check the box next to "Use Cached Exchange Mode" to enable Cached Mode. Uncheck the box to disable Cached mode. Then click Next.
Now click on the Finish button.
You must now exit and then reopen Outlook 2003 to continue.
Windows Vista Ultimate
ASUS PCDL Motherboard
Dual Thermaltake Aquarius III
Dual Xeons 3.06 oc\'d to 3.38
2GB Kingston Hyper X
2 120gb HDD
geforce 5200 256
Dual DVD burners