Hello,
I have deployed our VSTO 2005 Excel application to a network share
using the publish wizard, and also gave full trust to the network share
location on every client computer.

Now, the people using this Excel document like to do the following
things:
- Save the document to arbitrary locations, such as the local "My
Documents" folder or to a network share on one of many file servers in
the company
- Send the document per e-Mail to other users within the company

If they save the document to either the local hard disk or to the same
network share as the application was originally distributed, it is ok.
However, if they choose to save it elsewhere or to e-mail it to a
fellow coworker, they get the following exception when opening the
document:
The customization does not have the required permissions to execute.

************** Exception Text **************
System.Security.SecurityException: The customization does not have the
required permissions to execute.
  at
Microsoft.VisualStudio.Tools.Applications.Runtime.AppDomainManagerInternal.HandleOnlineOffline(Exception
e, String basePath, String filePath)
  at
(...)

I generally want that the documents can be saved anywhere (within the
company's file servers) and also be sent via e-mail. How can that be
achieved? (I'm aware that I could switch off .NET security altogether,
but that is not an option).

What I do not understand: The .NET Assemblies are saved in the original
network share location and are being loaded from there, even if the
document is saved elsewhere. So the location where the .NET assemblies
are is still trusted. Why is there still an exception being thrown?

Thanks for any help
Urs