Assuming your auth module provides a REMOTE_USER variable in the context of the apache request, you probably need to provide a line like this: RequestHeader set REMOTE_USER %{REMOTE_USER}s In your reverse proxy configuration. For example, the following configuration might be used in an SSPI configuration for Apache: <VirtualHost> <Location /> Order allow,deny Allow from all AuthName "FOO.COM" AuthType SSPI SSPIPackage NTLM SSPIOfferSSPI On SSPIAuth On SSPIAuthoritative On SSPIOmitDomain On SSPIOfferBasic On require valid-user </Location> # Proxy Configurations ProxyVia On ProxyPassInterpolateEnv On <Proxy *> Order allow,deny Allow from all </Proxy> ProxyPass / http://foo.com:8000/ ProxyPassReverse / http://foo2.com:8000/ ProxyPassReverseCookieDomain foo.com foo2.com ProxyPassReverseCookiePath / / RequestHeader set REMOTE_USER %{REMOTE_USER}s </VirtualHost> ... View more

In 4.1 and 4.1.1 you cannot specify the user in the workflow action. However, this is an interesting idea and I'll see if I can add something for 4.1.2. ... View more