If you are running a network-licensed version of Revit, you can borrow a license from a license server so that you can use the software for a specified time when your computer is not connected to the network. The license is returned to the license server automatically at the end of the day on the return date that you specified when you borrowed the license. You can also return a license early.
To borrow a license
Be sure the date is within the valid range as shown in the dialog.
When the license-borrowing period expires, the borrowed license is returned to the license server automatically. When you reconnect your computer to the network, you may start Revit normally. Successful startup of the software indicates that you have acquired the usual (online) network license. At that point, you can borrow a license again.
To return a license early