We need to know what is the maximum # of users who access our Exch2K3 concurrently. To this end, I am monitoring in PerfMon the counter "Maximum Users" of Object MSExchangeIS which is defined as "the maximum number of concurrent users since startup."
However, this number is around 530 while we have only 320 mailboxes and users. What could account for this high number? We do have Blackberry users. Could users be logging mulitple times, thru Outlook MAPI, Outlook OWA and BB?
Related to this, how does the counter "Maximum Connections" (the maximum number of concurrent connections since startup) differ from above counter/? Thanks.