Outlook 2007 will not upload large file attachments?

PROBLEM: User was unable to send large file attachments (Over 1.6 GB) using Outlook 2007. Webmail will allow the file to be attached.
RESOLUTION: The default timeout value in Outlook 2007 is 60 seconds, too short for most ISP connection speeds to send large files. Resolution is changing the default timeout to 300 seconds using these steps. In Outlook, Click Tools, Accounts, Change, Advanced, Server Timeout, there change the timeout to 300 seconds save and exit.