Office365: Using Exchange in Online Mode
Posted on 2013-06-11
We are contemplating moving our in-house Exchange environment to Office365. We are a Citrix XenApp shop and as such, will probably have to use Online Mode. I've tested cached mode with the cache being on a network share. It works reasonable well, but I haven't scaled it out. I've read some whitepapers that explain why this isn't a good idea.
So, in testing Online mode, there is a detectable delay when switching emails or folders. My question is this: how do I test this accurately? We have 1500 users and I don't know what the bandwidth requirement is. Second to that, I read somewhere (can't find it) that you can exhaust your WAN IP's available ports, as each Outlook session will require multiple ports.
How can I test this to scale? Are there other things I should be considering?