How to Reinstall Local vSphere Web Client plug-in for Veeam Backup & Replication

To reinstall the plug-in:

1. In Veeam Backup Enterprise Manager, go to the vCenter Servers section of the Configuration view.
   
2. Select the vCenter server you need and click Check version.
   
3. If a connection to the vCenter server is successful, and the plug-in is installed in the vSphere Web Client, the Remove link will become active. Click the link to uninstall the plug-in.
   
4. After the uninstall process completes, the plug-in status for the vCenter server in Enterprise Manager will change to Not installed. The plug-in will also be removed from the list of plug-ins in the vSphere Web Client.
   
5. On the vCenter server, restart the following services:
   • VMware vSphere 7.0.0.x with the HTML 5 user interface - restart the VMware vSphere Client service named vsphere-ui.
   • VMware vSphere 6.7.x with the HTML 5 user interface, restart two services: 
     • VMware vSphere Client (vsphere-ui)
     • VMware vSphere Web Client
       • vsphere-client for vCenter Server Appliance implementation
         or
       • vspherewebclientsvc for vCenter Server on Microsoft Windows Server
   • VMware vSphere 6.5.x and earlier with the flex/flash user interface, restart the vCenter Web Client Service
     • vsphere-client for vCenter Server Appliance implementation
       or
     • vspherewebclientsvc for vCenter Server on Microsoft Windows Server).
6. Ensure no plug-in components remain on the vCenter server:
   • In the case of vCenter Server Appliance, open an SSH session to vCenter Server Appliance and remove all entries returned by the find / -name '*veeam*' command.
   • In the case of vCenter Server on Microsoft Windows Server, log in to the OS and remove all files and folders that contain veeam in their names from the %programdata%\vmware and %programfiles%\vmware folders.
7. Install the plug-in once again. See the Installing vSphere Web Client Plug-in section in the Veeam Backup Enterprise Manager Guide for details.