This article discusses the "Certificate Status" alarm in vCenter Server.
vCenter Server 7.x/
vCenter Server 8.x
The "Certificate Status" alarm is configured based on the vpxd.cert.threshold and vpxd.certmgmt.certs.hardThreshold advanced settings in vCenter. The default value for both settings is 30.
This means that when solution user certificates are expiring in 30 days or less, the alarm will be thrown.
Replace the solution user certificates so that their expiration dates are further than 30 days away.