JetStress is a fantastic tool for Exchange testing and benchmarking. It can be daunting though and needs a fair amount of understanding. This latest field guide from the Exchange Team is mandatory reading.
Microsoft released the first service pack for Office 2011 for Mac. There's not a host of noticeable changes, most of the work is under the hood a few security holes sewn up etc. Here's my initial pass focussing on Outlook.
Key points of interest from a tailored UC session at Cisco Bedfont Lakes.
Service Packs on Microsoft operating systems can cause as much havoc as they can resolve, just be cautious and don't rush to install them straight away.
Office 365 Takes over where BPOS finishes off. There's a lot to take in, and a lot of changes. I took a lot of notes, I've noted them here.