Hello, we have never had any issues connecting our remote clients to our exchange 2003 server via outlook 2007. However, now that we are starting to implement office 2010, we have not been able to conect any of these 2010 users to our exchange 2003 server via RPC over HTTP. We go through all the usual settings as far as configuring all the connection settings in the same way we did with our outlook 2007 clients - however we get an error saying that the exchange server is unavailable. It seems that this is a widely known issue but I haven't been able to get an answer on this. Please help.