: The server's certificate has passed its "Valid Until" date.
Before changing settings, ensure your system clock is accurate.
: Go to System Preferences > Date & Time and ensure "Set date and time automatically" is checked. 2. Verify the Portal Address in a Browser globalprotect vpn failed to verify certificate
: The address you typed (e.g., ://company.com ) doesn't match the "Common Name" (CN) or "Subject Alternative Name" (SAN) on the actual certificate.
: Some administrators recommend deleting tca.cer from C:\Program Files\Palo Alto Networks\GlobalProtect and refreshing the connection. 4. Disable Conflicting Proxies or Interceptors : The server's certificate has passed its "Valid Until" date
: Your device doesn't recognize the certificate authority (CA) that issued the VPN server's certificate.
: Right-click the clock > Adjust date/time > Sync now . globalprotect vpn failed to verify certificate
If the browser shows a "Your connection is not private" warning, the issue is on the server side (expired cert) or a missing Root CA on your machine.
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