Generally, schema checking is performed by the server that exposes the schema. In a scenario where Directory Proxy Server acts as a proxy to one or more Directory Servers, the Directory Servers check that add and modify requests adhere to their LDAP schema. When Directory Proxy Server exposes its own schema. Directory Proxy Server must check that add and modify requests adhere to these schema.
Because a schema is defined for a specific connection handler, schema checking is enabled per connection handler. Schema checking is enabled by setting the schemaCheck attribute of a connection handler to true.