capacity planning for 4000 users

[february]

Hi,

I need to know the requirement in term number of server for MTA, LDAP,Mailbox, and memory capacity and volume for hard disk. For your info, I intend to use quad core.

[phoenix]

I don't know what this has got to do with Community News so I'll move it to the correct forum.

Have you had a look through the forums, there are several threads that cover this subject.