Starting with vSphere 6.0, vCenter Server monitors all certificates in the VMware Endpoint Certificate Store (VECS) and issues an alarm when a certificate is 30 days or less from its expiration. You can change how soon you are warned with the vpxd.cert.threshold advanced option.
- Log in to the vSphere Web Client.
- Select the vCenter Server object and click Configure.
- Click Advanced Settings and filter for threshold.
- Change the setting of vpxd.cert.threshold to the desired value and click OK.