* Even with SP1 installed, there seems to be a massive memory leak, at least in a single-server environment. I'm waiting on hold with PSS to get this sorted out right now (and yes, I have the aforementioned hotfix installed).
I'm seeing this, too. Server with Hub, Cas, and Mailbox role. Commited RAM will rise, rise, rise, but there is no indication what is taking the RAM. Did PSS give you any info?
Anyway, a couple of points of feedback:
1. Cluster support is too clunky. You do some things in Cluster administrator, some things in Powershell/Exchange GUI. Couldn't you find a way to consolidate?
2. Attributes that were in E2k3 GUI that are missing in E2k7 GUI. Most notably, mailbox size and number of items in mailbox.
3. I'll also second the certificate management confusion. Perhaps it's just because it's new, but it seems much more difficult to know what certs are where and how/where to apply new certs.