Global Protect Caching Username for Secondary Authentication

[MHaran]

Hi,

I have a slight issue whereby I am operating 2FA for my SSL users utilising Global Protect.  The initial authentication is using Single Sign On techniques to the domain controller with the secondary authenication requiring Entrust token input before connecting the the VPN.

Both work well, however upon connecting to the SSL VPN, the users are prompted with the authentication dialogue box for the Entrust username and password but the username is always pre-populated with the initial authentication credentials from domain credentials.  I'd like it so that the username entry is not pre-populated and is blank when offered to the users.

I have read numerous Palo Alto briefs on how to remove but no joy....any help appreciated.

Thanks