If the SSL-certificate on your VMware Horizon View Composer server is about to expire, it will have to be replaced. The process is pretty straight forward.
Import the new certificate (in PFX-format) in the Computer certificate store. You can use the MMC snap-in or certutil to accomplish the task. If it's not a publicly signed certificate, you will also need to make sure the intermediate and trusted root CA is imported.
Open an elevated command prompt.
Stop the VMware Horizon Composer service:net stop svid
Navigate to the install location of View Composer. The default location is C:\Program Files (x86)\VMware\VMware View Composer. On a 32-bit machine, leave out "(x86)".
In VMware Horizon View VDI, when using floating pools with instant clones, you may run across a problem where VMs get the "Already Used" status after users log off. The VM remains unavailable for further use and does not get deleted or refreshed.
The reason for this usually is that some process is blocking the refresh/delete operation, causing the VM to remain unusable and powered on to allow a system administrator to investigate the issue. If this is not desired (e.g., the reason for the blockage is known but cannot be resolved immediately), there is a policy which can be set to allow for automatic clean up of these "dirty" VMs.