Migrate option grayed out while trying to vMotion a VM

You may face the below issue on a vSphere environment:

Fix:

(Caution: Before performing these steps, make a note of the datastore where the virtual machine resides.)

1. In the vSphere Client, right-click the powered-off virtual machine and click Remove from Inventory.
2. Click Yes when prompted to confirm the removal.
3. Click Home > Storage
4. Open the Datastore and folder where the VM’s vmx file is stored
5. Right-click the .vmx file and click “Add to Inventory” (or “Register VM” in some verisons).
6. Follow the steps in the wizard to add the virtual machine back to the Inventory.
7. Click Home > Hosts and Clusters.
8. Right-click the virtual machine. The migrate option is now available.

Cheers!