As an IT Admin, you can add details of the previous assignees to track the history of device users within your organization.
Steps to add the Past Users
Step 1: Go to the device to add the past users. Click 
and select the View All Users option.
Step 2: Click Add Past User under Past Users.
Step 3: Select the user to assign the device and click Next.
Step 4: Select the assignment date and click Assign.
The device assignment date is set to the current date.