After regenerating, you'll need to update the key on each registered VMM server. To do this, stop the VMM service, run the ...

After regenerating, you'll need to update the key on each registered VMM server. To do this, stop the VMM service, run the Provider installation wizard, and paste the regenerated key into the Vault Registration page. Then, start the service. If you don't update the VMM servers with the regenerated key, the server won't be able to connect to Azure Site Recovery as expected.