Snapshot icon is greyed out on a virtual machine

Products

• VMware vSphere ESXi
• VMware vCenter Server 7.0

Issue/Introduction

When we try to take a snapshot on a virtual machine the option is greyed out along with delete snapshot. Manage snapshot take us to snapshot manager and all the icons are greyed including revert, delete all and create snapshot.

Environment

You find the following conclusions while troubleshooting the issue. 

-> There are no file locks on the VM.

-> The snapshot size is not beyond the limit, hardly there is one snapshot file.

-> We can take snapshot from the ESXi host, just on vCenter server it shows greyed out.

Cause

SRM configuration and DRS site change caused the VM to get into this state.

 

Resolution

1. Power-Off the virtual machine.

2. Right-click and remove from the inventory.

3. Navigate to the datastore

           →Browse the file for the Virtual machine

           →Locate the file ending with .vmx

           →Select and Register the VM.