Does anyone here know how many users (heavy webmail/IMAP/SMTP) and Activesync users can be put on a single server?
For example, our server:
E3 Xeon 3.6GHz (4 cores/8 threads)
24GB RAM DDR3-1600 Ram
(4) 4TB Western Digital RE4 7200RPM HDDs (SATA6GBps) in RAID10 for OS, Spool, and Data
Right now we have 2500 users and 500 ActiveSync users on it and its starting to crap out. Currently running SmarterMail 13
We are looking for an expert who can tell us what kind of hardware we need to support an X amount of users per server. Someone who has had experience scaling out to 10's of thousands or even 100's of thousands of users for an ISP. We are willing to pay for consultation fees.