A couple of weeks ago, I replaced our SBS 2008 server with SBS 2011. One user with a Windows Phone 8 then started asking me why, when he read an email on his phone, it did not show as read on his laptop. This worked almost immediately in SBS 2008. I now find that it takes a much longer time to synch, giving the impression that it has stopped working.
We also have 2 PC-Based users working on the same Outlook account, as 'office'. I notice that if I delete a message on one PC, it takes some time (ie 10 minutes or more) for the message to disappear on the other PC.
I've been looking through TechNet, and cannot find any reference to this sort of problem, and similarly no immediate reference in EE.
Any thoughts, anyone?