./dmctl -s <EISMDomainName> put VirtualMachine::<VMInstanceName>::DisableEvents TRUE
When this command is run, existing notifications for this VM will disappear from SAM and no further notifications will be generated.
Once the VM is powered on again, you can re-enable notifications as follows:
./dmctl -s <EiSMDomainName> put VirtualMachine::<VMInstanceName>::DisableEvents FALSE