We just deployed our CAS server about a month ago. Need to determine basic stats on the server. We would like to find out how many users are actually connecting to our CAS server. Is there any performance type counters for current connections and/or any that we can track over a time period? Thanks!

See here: Monitoring Client Access Servers http://technet.microsoft.com/en-us/exchange/bb201674(EXCHG.80).aspx & - Monitoring Common Counters- Monitoring Mailbox Servers- Monitoring Hub Transport Servers