BT2010 and Sharepoint 2010 WSS Adapter Web Service – The Windows SharePoint Services site was not found error

Hi,

I am trying to connect Biztalk Server 2010 and a Sharepoint
2010 site using Windows Sharepoint Services Adapter Web Service. However,
although we have installed and configure the Adapter in the Sharepoint side
successfully, we get the following error in Biztalk:

A message sent to adapter “Windows SharePoint
Services” on send port “SendPortWSharePoint” with URI
“wss://sharepoint.web:port/site” is suspended.

Error details: The Windows SharePoint Services site was not
found. The URL “http://sharepoint.web:port/” points to a SharePoint
object for which there is no Windows SharePoint Services site.

This error was triggered by the Windows SharePoint Services receive
location or send port with URI wss://sharepoint.web:port/site.

Windows SharePoint Services adapter event ID: 12292

MessageId: 
{9287DE96-A697-442B-B543-31A1A6B4CD22}

 InstanceID:
{90A6CBAD-657A-4666-820A-026F26EB1C26}

We have installed Windows Sharepoint Services Adapter Web
Service in the Sharepoint server.

As our Sharepoint 2010 Site is in a different server than
Biztalk, we have taken the following steps:

1. We have extended the site in Sharepoint Administration
Console – Application Management – Configure Alternate Access Mappings. The
extension is in the Extranet Zone

2. Windows Sharepoint Services Adapter Web Service is
configured to use the extended site.

3. We have tested that the Web Service is successfully
installed by accessing it in the browser:

                http://sharepoint.web:extendedport/BTSharePointAdapterWS/BTSharePointAdapterWS.asmx

Besides, we have configured the permissions according to the
documentation:

1. In the local group Sharepoint
enabled hosts of the Sharepoint Server, we have added Biztalk service
account and computer account of the Biztalk server.

2. We have configured the web application to allow anonymous
authentication and have changed the web.config of the Sharepoint adapter to
allow all users:

                <identity
impersonate=”true”/>

                                <authorization>

                                                <allow
users=”*”/>

                                </authorization>

3. We have given permissions to the Biztalk Service account
to access Sharepoint_Site_Content and Sharepoint_Config databases.

4. Also, we have given read permissions to this service account
in

Program Files (x86)\Microsoft BizTalk Server 2010\Business
Activity Services\BTSharePointV3AdapterWS folder and

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Shared Tools\Web
Server\Extensions\12.0\Secure\ConfigDB registry

Both servers are in the same domain and there is no firewall
between them.

We are stuck for more than two weeks with this issue and none
of the solutions in the blogs has helped us to solve it.

We would really appreciate your help with this.

Thank you very much in advance.

Kind regards,

Luis