what does "renew lease" mean in the wifi settings?

Renew Lease? No this doesn't charge you anything, this is just a button that you click that releases the IP address your device is currently assigned and asks for a new one. A VPN could cost you money if you set one up that's through a service, but it depends on the setup. A business usually has a device that works as the VPN.

http://whatismyipaddress.com/vpn

http://whatismyipaddress.com/dhcp

Beyond that basic information, we would need details about your office network and the exact nature of the problem before anyone could be of help. I'd suggest you start with your company's IT support staff and see if they can offer assistance.

Regards.

VPN is "Virtual Private Network" which are settings set by your IT professionals that will tell your iPad how to log into your network and become "Part" of your business network. This way if you are at home and for security reasons there are things you need to do and need to be at a computer in the office, you could be at home and your iPad would be part of the office network as if you logged in at your office.

When you renew your lease, you are basically telling your iPad to search for a new IP address on the network. Throughout times your ISP may change you IP address when the lease runs up on an IP address. When this is done, most times your router and modem will automatically update "renew" this address, and ocassionally need you to manually do this. Renewing this lease, does just that, it updates the address information so you can start to properly get information as needed from the network.

When you do this does it charge any