ldapsearch -LLL -H ldap://<domain>.<tld> -D "<user>@<domain>" -w "<password>" -S sub -b "DC=<domain>,DC=<tld>" "(&(objectClass=user))" sAMAccountName | grep -i samaccountname
ldapsearch -LLL -H ldap://<domain>.<tld> -D "<user>@<domain>" -w "<password>" -S sub -b "DC=<domain>,DC=<tld>" "(&(objectClass=user)(memberof:1.2.840.113556.1.4.1941:=CN=Domain Admins, CN=users,DC=<domain>,DC=<tld>))" sAMAccountName | grep -i samaccountname