You can change the password expiration according to your operational needs.
This page describes how to set passwords never expire.

To change password expiration for all users, configure the setting in the password policy section.

1. Click in the header.

2. Click Users & System Administration.
   Accessing Kintone Users & System Administration

3. Click Login.

4. Change the password expiration in the "Password Policy" section to "Unlimited".
   

5. Click Save.

When you change the password expiration for an individual user, you cannot extend it by specifying a certain period you want. You can only make it never expires.

1. Click in the header.

2. Click Users & System Administration.
   Accessing Kintone Users & System Administration

3. Click Departments & Users.

4. In the "Departments" box, select the department containing the user whose password you want to change, and then click for the user.
   You can also search users by filling in the search box with the display name or login name of the user.
   

5. Click Change Password.

6. Select "Use current password".
   The password does not appear as a visible text.
   

7. Select "Disable password expiration".
   You can select this to disable password expiration for the user, regardless of the setting of password policy.
   

8. Click Save.