Community,

I was searching the Internet looking for a article or document that would provide me with number of mailbox users per server limits. I was told that a good rule of thumb is 4000-6000 users per server. I was trying to find something to back this statement up. I was unable to find anything that gave me a limit on this. What do you use as a limit and is there any documentation to back up your claim or is this from your experience with Exchange 2010 at your multiple customer sights. during my search I did find a nice article on "The exchange team Blog" written by Nicole Allen below is the link to the article it was a nice read

http://blogs.technet.com/b/exchange/archive/2005/03/14/395229.aspx