Using ConnectorXpress 1.0 and working with a custom SCIM endpoint type, if selecting the Synchronized checkbox on a User Account attribute and then trying to deploy the metadata it fails with a java.lang.NullPointerException error.
All Identity Manager
When selecting the Synchronized checkbox on any User Account attribute then the Group object which has an attribute "Members" gets updated with a new value on the "DNLdap Object Classes" multivalued attribute value of "eTDYNPolicy" and the presence of this value causes the deploy metadata to fail.
Delete this "eTDYNPolicy" value that was added and then you are able to deploy the metadata.