If you start the VI client from the command prompt or with a shortcut, you can add several options to bypass the login screen. If you’re using vCenter server you can use –usePassthroughAuth and –server to login to your vCenter server. Instead of –server you can also use the -s option.
C:\Program Files\VMware\Infrastructure\Virtual Infrastructure Client\Launcher>vp xclient –PassthroughAuth –server <vCenter_hostname_or_IP>
If you connect to a standalone ESXi host, you can specify the host, login, and password to use.
C:\Program Files\VMware\Infrastructure\Virtual Infrastructure Client\Launcher>vp xclient –user root –password secret –server ESX01
C:\Program Files\VMware\Infrastructure\Virtual Infrastructure Client\Launcher>vp xclient -u root -p secret -s ESX01