We have an Outlook 2003 addin written in VSTO 2005. We deploy into HKLM so
there is no manual way to disable the addin using Outlook Tools menu. In
production mode, the addin still gets disabled sometimes. We have found out
that one of the ways that user can disable the addin is by killing the
Outlook process while it is still loading. We have implemented ways to make
the addin start up faster and there is not much we can do there.

Are there other ways in which the addin can be disabled? If so, how can we
prevent the addin from being disabled? We implement ThisAddin_Startup and
ThisAddin_Shutdown methods and these are enclosed in try..catch blocks.

Thanks