When the users come back from their temporary leave or temporary assignment, revert their status to "Active".
They can access Kintone once their status is changed.

1. Access Administration.
   Accessing Administration

2. Click Departments & users.
   

3. In the search box, enter the display name or login name of the user to find the target user.
   You can also expand the department tree and select the target user.

4. Click the Change icon.
   

5. In the "Account status" section, set "Status" to Active.
   

6. Click Change user information.