---
title: "Veeam VMware: vSphere vCenter Host Certificate Management Mode Alarm"
description: "This monitor tracks the vCenter Alarm 'vSphere vCenter Host Certificate Management Mode'. By default, the alarm is triggered by the following event: com.vmware.vc.certmgr.HostCertManagementModeChangedEvent: Certificate management mode of the..."
canonical: "https://helpcenter.veeam.com/docs/mp/kb/host_certificate_management_mode.html"
breadcrumb: "Veeam MP for VMware Online Knowledge Base > vCenter Server Alarms > Veeam VMware: vSphere vCenter Host Certificate Management Mode Alarm"
dateModified: "2026-09-10"
---

# Veeam VMware: vSphere vCenter Host Certificate Management Mode Alarm

This monitor tracks the vCenter Alarm 'vSphere vCenter Host Certificate Management Mode'.

By default, the alarm is triggered by the following event:

- **com.vmware.vc.certmgr.HostCertManagementModeChangedEvent**: Certificate management mode of the vCenter Server was changed.

Make sure that secure modes such as VMware Certification Authority or Custom Certificate Authority are working correctly; make sure that CAs are accessible and their certificates are valid; switch to a more secure mode, if necessary. For more information on certificate management for ESXi hosts, see [VMware vSphere Documentation](https://techdocs.broadcom.com/us/en/vmware-cis/vsphere/vsphere/8-0/vsphere-security-8-0/securing-esxi-hosts/certificate-management-for-esxi-hosts.html).

See the [Help Center](https://www.veeam.com/documentation-guides-datasheets.html?prd=mp) for more information including reference lists of all Rules and Monitors and full set of User Guides for the Veeam MP for VMware.

See the [VMware Online Documentation](https://docs.vmware.com/) for more information on VMware vSphere, in particular:

- [Troubleshooting Guide](https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.networking.doc/GUID-DE119813-63A7-4B68-924D-1ED95F6EFFD7.html)
- [Resource Management Guide](https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.resmgmt.doc/GUID-98BD5A8A-260A-494F-BAAE-74781F5C4B87.html)
- [Networking Guide](https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.networking.doc/GUID-35B40B0B-0C13-43B2-BC85-18C9C91BE2D4.html)
- [Storage Guide](https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.storage.doc/GUID-8AE88758-20C1-4873-99C7-181EF9ACFA70.html)