A customer send out the request to take a look at a few alarms they received in the NSX Manager console. The alarm they received was about a expiring certificate for local manager.
We did some investigating from the NSX Manager and it was clear that this was a self-signed (not linked to the company own PKI infrastructure) and it was in use. This last comment means we have to use the Application Programing Interface (API) to tell NSX to use the new certificate.
Since this is a production environment we don’t do anything before we have verified that a recent backup of the NSX database is available. Please take note that a VMware snapshot is not supported the restore a NSX Manager Cluster. It is best practice to have a scheduled NSX Manager backup schedule. Before we start working on the environment we create a manual backup of the NSX database.
vSphere 8 has been released on October 11 in 2022. It was first announced during the VMware Explore US (the event previously known as VMworld). vSphere 8 includes many new features . To be clear, when we talk about vSphere we talk about both vCenter Server and ESXi. 
Placing a VMware vSphere ESXi host in maintenance mode works the same whether the VMs run on vSAN or other types of attached storage. But if the VMs are running on vSphere on a Nutanix cluster the process of placing a host into maintenance mode does work a little different. This is because of the way Nutanix is working together with VMware vSphere ESXi. On every VMware vSphere ESXi host on Nutanix, there is a VM called Controller Virtual Machine (CVM). This VM controls and managed the storage usage. All the storage IO for a host goes through that CVM VM. 
Back in June 2019 VMware published a press report on there intent to acquire AVI Networks. AVI Networks was a leader in the multi-cloud application delivery services. VMware has rebranded the load balancing product, it is now called NSX Advanced Load Balancer.