2980fa92_Microsoft_Outlook_2000__Update
[Description] Adds support for registry entries that force Outlook to use polling to check for new messages on the Exchange Server, rather than waiting for UDP packets. [Outllib.dll version] 9.0.0.5505 [Update] 
You Cannot Receive New E-mail Notifications in Environments That Use the Network Address Translation
Microsoft Outlook 2000
Update