If your Coupa account already has users you want to provision with the Coupa Connector, this is possible by following the steps below.
Ensure that the value mapped to the email attribute, when configuring the
connector matches the existing Coupa users email address exactly as it appears in
Coupa.
For example, on the Attribute Mapping tab, the user's
email attribute on Coupa is mapped to the user's
mail attribute in your LDAP. This synchronizes a user that already
exists on Coupa with an email address in Coupa of john.smith@mydomain.com.
In this case, the user's mail attribute in LDAP would also have to
be john.smith@mydomain.com.
When the Coupa connector provisions for the first time, this address is used to synchronize the user in your LDAP datastore with the user in Coupa.