Import-Module activedirectoryReferences:
Import-Module Lync
Get-ADUser -Filter * -SearchBase "OU=MyUsers,dc=domain,dc=com" | foreach {Enable-CsUser -RegistrarPool "LyncPool1.domain.com" -SipAddressType EmailAddress -SipDomain "domain.com" -Identity $_.SamAccountName}
RSAT with SP1
http://www.microsoft.com/downloads/en/details.aspx?FamilyID=7d2f6ad7-656b-4313-a005-4e344e43997d&displaylang=en