<p>You don't have permission to access /dws/services/PublishingService20.PublishingService20HttpSoap12Endpoint/
on this server.</p>
<address>Apache/2.2.3 (Red Hat) Server at integration.digabit.com Port 80</address>
The error results from a flawed endpoint URL that includes "http" and port ":80":
Note: The example shows only the integration environment, but the resolution works for ALL environments (production, demo, etc).