Object identifiers (also known as OIDs) are numbers that identify an object class or attribute. An object identifier is represented as a dotted decimal string, such as, with each dot representing a new branch in the hierarchy.

Object identifiers are organized into an industry-wide global hierarchy. Registration authorities issue root object identifiers to individuals or organizations, who manage the hierarchy below their root object identifier.

Object identifiers must be unique within an enterprise.

To create a new object identifier
  1. Open the Certificate Templates snap-in.

  2. In the details pane, right-click the certificate template that you want to change, and then click Properties.

  3. On the Extensions tab, click Application Policies, and then click Edit.

  4. In Edit Application Policies Extension, click Add.

  5. In Add Application Policy, click New.

  6. Provide the requested information.