Thanks for this, as far as I know the connection string it in the compiled exe. It also does not use a dsn to connect to the database.

We have got round the problem by creating SQL logins for the 2 problem users and setting the language to "English". SQL seems to look for the users first before the groups and use that as the login to connect with. We have not given these users access to the CRM database through these logins, so they still access that database through the original CRM DB user groups (still set to "British English"). Therefore both apps work.

Not ideal, but at least it works ok.

Trevor