I installed exchange server 2010 for the first time after the using of exchange server 2003 and now want to create mailbox for the existing users. But I did,nt get any good article from any where. I am confiused to create the mailbox in "Server configuration" or in "recipent configuration,so please help me in this regard.
You can do this in the GUI under Recipient Configuration > New Mailbox > User Mailbox > Existing User, and choose the user you wish to create the mailbox for.
From the shell:
You must be logged in with an account with sufficient privilege to create a mailbox in Exchange.
As an aside, there have been reported issues with the built-in Domain Administrator account and Exchange 2010. If you experience any issues with the built-in account, create a new account with administrative privilege.