To renew the certificate:

1. Open the Certificates MMC Snap-In, navigate to the Local Computer/Personal store and find the expired certificate. Right-click on the certificate then select Delete.
2. On the Apex One server, open Command Prompt.
3. Navigate to ..\Program Files (x86)\Trend Micro\Apex One\PCCSRV.
4. Run the following command to add a new certificate to the IIS certificate store:
   svrsvcsetup -GenIISCert
5. Open the IIS Manager console (inetmgr.exe).
6. In the IIS Manager, expand the Sites folder and highlight the OfficeScan virtual site.
7. In the Actions pane, click Bindings... to open the Site Bindings window.
8. In the Site Bindings window, select type="https" and click Edit.... The Edit Site Binding window will appear.
9. From the SSL Certificate section, click the Select... button and verify that the certificate expiration date has been extended, or select the certificate with the latest expiration date.
10. Click OK to close the window.