@gyrodude TIL this is a new feature in PAN-OS 9.0:
Pre-Logon Followed By Two-Factor and SAML Authentication
The GlobalProtect app for Windows and Mac endpoints now supports pre-logon followed by two-factor or SAML authentication for user login. After the pre-logon tunnel is established, the user can log in to the endpoint and authenticate using the configured authentication method. If authentication is successful on Windows endpoints, the pre-logon tunnel is seamlessly renamed to User tunnel and the GlobalProtect connection is established. If authentication is successful on macOS endpoints, a new tunnel is created and the GlobalProtect connection is established.
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