If the SAML certificate expires, users become unable to single sign-on to Kintone.
When the certificate is about to expire, issue a new certificate with IdP and register it to Kintone.

1. Access Administration.
   Accessing Administration

2. Click Login.

3. Click Browse and select a new public key certificate file.
   

4. Click Save.

The certificate renewal is complete when you can successfully perform the following actions:

• You can single sign-on to Kintone using SAML authentication.
• You can log out from Kintone.
  logging out