Click Policies > Policies > New.
Specify a name for the policy, select Identity Server: External Attribute Source for the type of policy, then click OK.
Specify the following details:
Description: (Optional) Specify the purpose of this policy.
Priority: Specify the sequence in which a rule is applied in the policy, when the policy has multiple rules. The highest priority is 1 and the lowest priority is 10.
In the Actions section, click New, then select Fetch Attributes.
Specify the following details:
External Attribute Name: Specify the name of the attribute to be obtained through this policy.
Value: Specify String Constant or Data Extension for the attribute value.
String Constant returns the string constant.
Data Extension returns the attributes based on the logic defined in the class. For more information about policy extension, see Adding Policy Extensions.
Click OK > OK > Apply Changes.
After creating an External Attribute Source policy, create a shared secret. This shared secret is used in configuring other policies or can be used by Identity Servers in their attribute sets to retrieve attributes from external sources. For more information, see Creating Shared Secret Names.