LDAP Import - How to exclude sub ou?

[Kifrez]

Hi All,

We have starting search directory OU=Users,OU=CompanyA,DC=abc,DC=com, DC=au

We have sub OU called contractors (OU=Contractors) so in AD, it will be OU=Contractors,OU=Users,OU=CompanyA,DC=abc,DC=com, DC=au

How do I exclude OU=Contractors?

I have LDAP OU Definition 
Query field = sAMAccountName
Filter = (&(objectClass=person)(sn=*)(!(objectClass=computer)) (!(userAccountControl:1.2.840.113556.1.4.803:=2)))

I've tried to add (!(OU=Contractors)), but this doesn't seem to exclude when I browse or do test load.
Modified filter = (&(objectClass=person)(sn=*)(!(objectClass=computer)) (!(OU=Contractors)) (!(userAccountControl:1.2.840.113556.1.4.803:=2)))

Thank you in advanced for your assistance.

[Kifrez · Accepted solution]

ServiceNow said this is not possible to filter by OU after the searchbase is defined.

If want to be excluded under the searchbase, requires an exclusion using Attributes.

For example:

If you would like to exclude employeeType=Contractor, then use the following filter.

(&(objectClass=person)(sn=*)(!(objectClass=computer)) (!(employeeType=Contractor))(!(userAccountControl:1.2.840.113556.1.4.803:=2)))