Option to use Word to edit e-mail msgs turns off by itself

[Lloyd]

In our institution, we have "Use Microsoft Word to edit e-
mail messages" checked off as an option in the Tools |
Options | Mail Format. However, periodically, this
option seems to get unchecked by itself.

Does anyone know what might be causing this to happen,
and how to prevent it from being changed?

Thanks for any feedback on this.

Lloyd