Good luck!!!LDAP is one of the nicer imports that client like but the biggest thing is finding the right searchscope and additional fields they might be interested in such as cell phone numbers and domain IDs...etc.
Hi Integration 4.5 with AD possible only n Persons level and accounts too without password(password AD <> password SD). That mean You cal synchronize Person+Organization and AD records and departments, use for this internal SD tool or LDAPExtractor(very good tool). Password sync. possible doing if your company have MIIS server.