Dear all,

just hope to get some advice on how to plan 15000 users who locates in two major cities?

currently planning to have:

location 1:
1 server for major LDAP
1 server for MTA + Mailbox(for users in location1), plus one external storage

location 2:
1 server for LDAP replica
1 server for MTA + Mailbox(for users in location2), plus one external storage

by the way, how about the disaster recovery? any advice on this?

Thanks.