We've tested SharePoint on Office 365 to play nicely up to 300ms, and I've personally seen it work well at higher latency levels than this, as long as all other network settings (tcp window scaling, packet sizes, proxy performance etc) are all optimal. With Outlook the effec...
We can use this tool to measure latency internally (by running a server version on the remote end) but as this is O365 we can't do that but it does a great job of measuring the RTT on the three way handshake. What it does is complete a TCP connection to the IP address...