I have a network in Mexico that is on the other end of a sonicwall VPN. Since a T1 was going to be prohibitively expensive, we have a dedicated 4mb DSL connection that holds the VPN. Performance is OK, but there is a certain amount of fluctuation over the course of the day, from acceptable to fairly slow.
We have an exchange 2007 server on this end. Right now, because of the relatively slow bandwidth, all of the users use OWA to connect from the Mexico plant to the exchange server here. They all have outlook 2003, but it isn't used. I'd like many of them to be able to use Outlook.
My question is what would be the best performance option in that situation? Should I just keep them on OWA, configure outlook to connect to the exchange server up here using RPC over HTTP, or use the regular mapi connection of outlook 2003 in cache mode?