We have a 2003 Exchange server that is accessed by remote clients. It's running on Windows 2003 Standard.
A handful (maybe 4-5) of these remote clients are in Australia (the server is in the states) and they are having difficulty sending emails promptly from Outlook.
They are using Outlook 2003 and are connecting to the Exchange server using RPC over HTTP.
It appears that Outlook seems to lose it's connection to the server for brief periods. It says trying to connect in the lower right and it may sit like that for 5mins or so. In the meantime emails will pile up in the outbox. After 5mins or so it seems Outlook will finally connect and send the messages.
During the time when Outlook cannot connect, users can still access the internet and can even ping the exchange server successfully (via DNS and by IP).
No specific error message is given as it always seems to connect eventually, it just takes a while.
Any thoughts? Thanks!