Usernames vs. OU's

["Hutchins, Mike" <mike.hutchins@amr.net>]

So, if someone has a uid of bsmith, and their dn is cn=Bill
Smith,ou=myou,o=myorg

Will openldap automatically use uid? If it does, I can use a million
OU's, if not, then if I use OU's won't the users have to use their
entire DN to login?