Depending on your environment, you want to be able to shut-down processing of your Flynet Web Services IIS Application folder so that you have a time-slot to update the password on the host and in your local encrypted password file.
In some environments, this will be a certain time of day or based on the frequency of client calls to the web services.
For example, if your client process makes calls once every five minutes, you can watch the Flynet Viewer Management Console to observe a "batch" and then proceed with the change to the password in-between the next call cycle.