LDAP account not in 'Users'

This might be a dumb question but here goes:

I’m currently having this config in gitlab.rb for our Active Directory connection:

'bind_dn' => 'CN=serviceldap,CN=Users,DC=Contoso,DC=com',

and this works fine except, I would like to have the account ‘serviceldap’ to not reside in ‘Users’ but in an OU called ‘Service’ which we use for all of our service accounts. Is this possible? Or is it mandatory by Active Directory itself to have such an account to reside in ‘Users’? I’ve tried doing:
'bind_dn' => 'CN=serviceldap,OU=Service,DC=Contoso,DC=com', but that broke the LDAP link.

Thanks in advance.