We are migrating our mailboxes to O365 Exchange Online. We've notice that outlook responsiveness is slow. Not horrible but annoying. you can see the delay when moving to different emails and sending. I do realize that a lot has to do with internet connection (we currently have a 50Mbps line Up/Down) but are their any other tweaks that we can try?
Also, does the connection piggy back on any proxy settings we may have in IE?