Use the following procedure to configure the App-V Desktop Client for proper Windows XP credentials.
After finishing this procedure, the non-domain joined client can perform a publishing refresh without being joined to a domain.
To assign the proper credentials for App-V clients running Windows XP
With administrator privileges on the App-V Client running Windows XP, open the User Accounts control panel (Classic Control Panel).
Click the Advanced Tab, and select Manage Passwords.
On the Stored User Names and Passwords screen, click Add.
On the Logon Information Properties screen, fill out the following fields with information from the App-V infrastructure:
Server: Name of publishing server external name.
User name: User name for external user in the form Domain\username.
Password: Password for the user account entered in the User name field.
Click OK. The credentials will be stored on the client.