: The server's certificate has passed its "Valid Until" date.
Most verification issues stem from one of these four categories:
: Delete files starting with PanPortal* in ~/Library/Application Support/PaloAltoNetworks/GlobalProtect/ . globalprotect vpn failed to verify 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
Before changing settings, ensure your system clock is accurate. : 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
: The address you typed (e.g., ://company.com ) doesn't match the "Common Name" (CN) or "Subject Alternative Name" (SAN) on the actual certificate.