Open the [Cisco AnyConnect Secure Mobility Client].
For example, Click [Windows Mark]→[Cisco]→[Cisco AnyConnect Secure Mobility Client]→[Cisco Anyconnect Secure Mobility Client].
Type kekvpn.kek.jp/uap and click [Connect].
Enter your username and password. (The username and password are the same as what you were using before the system migration.)
Then click [OK].
If the authentication is successful, the VPN connection will be initiated and an icon with a key mark will appear on the taskbar.