worklight http adapter and NTLM authentication - authentication

Question

i'm trying to implement NTLM authentication in a Worklight HTTP Adapter in order to connect to M$ back-end servers, such as Sharepoint Web services.
i've set-up my adapter.xml file with <ntlm>.
The adapter.xml structure first version was:
<authentication>
<ntlm />
<serverIdentity>
<username>user</username>
<password>password</password>
</serverIdentity>
</authentication>
My tests are done locally with Worklight studio, i get the following issues:
1) error when invocating WL procedure:
Procedure invocation failed:Could not resolve placeholder 'local.hostname'
where do i have to put this 'local.hostname' setting?
2) i tried to specifiy the hostname property of ntlm tag as given in documentation (IBM infocenter), WL Studio says that the xml is bad formed.
<authentication>
<ntlm hostname="myComputer.intranet.com"/>
<serverIdentity>
<username>user</username>
<password>password</password>
</serverIdentity>
</authentication>
Where "myComputer.intranet.com" is my computer's name within my corporate network.
Attribute 'hostname' is not allowed to appear in element 'ntlm'

Answer 1

Response from IBM Service Request:
The username used to authenticate with NTLM-enabled back-end system must be left padded with the windows domain name followed by a \, and the username.
<serverIdentity>
<username>domain\user</username>
<password>password</password>
</serverIdentity>
This works with hard-coded serverIdentity feature.
Due to security governance in my company, there can't be "generic" server identity. So i have to forward the end users' credentials to back-end systems to authenticate.
How to do this with Worklight authentication mecanisms (adapter-based for instance), where can i set the domain for my username?
Can i mix several kinds of security realms depending on adapters?