A computing device provides an application that uses multiple protocol stacks to communicate with a server. The server requires messages from each of the protocol stacks to include a credential for a user of the computing device. The credential is a set of information that includes identification and proof of identities that is used to gain access to a resource. However, the user is not prompted for the credential more than once. In some embodiments, this is accomplished by storing the credential at the computing device for retrieval by the protocol stacks when the application uses the protocol stacks to communicate with the server.