def server_side_activation=(activation)
      raise JSS::InvalidDataError, 'Activation must be a Time' unless activation.is_a? Time
      @server_side_limitations[:activation] = activation
      @need_to_update = true
    end
def server_side_activation=(activation)
      raise JSS::InvalidDataError, 'Activation must be a Time' unless activation.is_a? Time
      @server_side_limitations[:activation] = activation
      @need_to_update = true
    end
Set Server Side Activation

 @param activation[Time] Activation date and time

 @return [void]