Enable the Web Service Proxy

Solution: Use the Set-SPInfoPathWebServiceProxy cmdlet.

The InfoPath Form Services web services proxy can be used to access web services without passing the credentials of the form user. A set of credentials for the web service needs to be stored within SharePoint’s Secure Store Service (SSS), which is the replacement for Single Sign-On (SSO).

You need to modify a data connection file that your InfoPath form is using as a web service connection by adding a UseFormsServiceProxy attribute with a setting of true (see Listing 12.7), along with an Authentication element that references the Secure Store application ID (see Listing 12.8).

Listing 12.7. UseFormsServiceProxy Attribute in the Data Connection File

<udc:ServiceUrl UseFormsServiceProxy="true"/>

Listing 12.8. Authentication Element in the Data Connection File

<udc:Authentication>
    <udc:SSO AppId="<<AppID>>" CredentialType="<<credential type>>"/>
</udc:Authentication>

The possible credential types are as follows:

• Basic

• CD

• Digest

• Kerberos

• NTLM

• SQL

To enable the use of the web proxy, use the following cmdlet:

Set-SPInfoPathWebServiceProxy -Identity "<<URL of web application>>"
-AllowWebServiceProxy $true

To enable SharePoint forms to use the web proxy, use the following cmdlet:

Set-SPInfoPathWebServiceProxy -Identity "<<URL of web application>>"
-AllowForUserForms $true