Site Recovery Manager plugin has 'Not Accessible' status in vSphere Client

Products

• VMware Site Recovery Manager

Issue/Introduction

• In an Enhanced Linked Mode (ELM) environment with vCenter 8.0.x and Site Recovery Manager (SRM) 9.1, the Site Recovery plugin shows as 'Not accessible' for the remote site.
  
  
• The local SRM instance health appears green (OK), but the remote instance paired to it displays a red exclamation mark. Despite the status error, clicking 'OPEN Site Recovery' or navigating directly to the /dr page works correctly.

Environment

VMware vCenter Server 8.x

VMware Live Recovery 9.1

Cause

This issue is caused by stale plugin residues from previous versions (e.g., 9.0.2 or 9.0.5) remaining in the vCenter Server package directory after an upgrade to SRM 9.1. The vSphere UI service attempts to load these older versions alongside the current one, causing a conflict and a false-positive health check failure.

Resolution

Manually remove the stale plugin folders from the vCenter Server Appliance (VCSA):

Take an offline snapshot of the vCenter Server Appliance before proceeding.

1. SSH to the vCenter Server as root.
   
   
2. Stop the vSphere UI service: service-control --stop vsphere-ui
   
   
3. Navigate to the plugin directory: cd /etc/vmware/vsphere-ui/vc-packages/vsphere-client-serenity/
   
   
4. Identify and remove any stale SRM (drui) or vsan-snapshot-manager folders that do not match the current 9.1 build.
   
   Example folders to remove:
   rm -rf com.vmware.drui.plugin-9.0.5.100
rm -rf com.vmware.vsan.snapshot.manager.client-9.0.2.0
   
   
5. Start the vSphere UI service: service-control --start vsphere-ui
   
   
6. Verify that the health status in the Protection and Recovery view now correctly reflects as 'OK' for both sites.