Exchange - Creating a new account/Email address as required

Go to exchange server
Open Exchange Management Console
Navigate to tree "Recipient Configuration"
Right click on Mailbox  -> Select New Mailbox
Select User Mailbox -> Next
Select New User -> Next

Type only the First Name as you desire your email/account name should be.

e.g. First Name = soc, User Logon Name= soc

Once completed you can rename the First Name/Last Name as desired.