It is possible to manually edit a computer's warranty information. You are able to simply open the computer details page and click on the tab labeled “Lifecycle,” as shown below.
Clicking on “New Warranty” tab will open the following pop-up where you can enter details on the specific warranty - as per the screenshot below:
Note that it is only be possible to edit manually-created warranties. Automatically created warranties cannot be edited.
At your service,
The Samanage Team