Currently we have a vba application with Excel front end and sql server 2008 database which performs complex calculations and loads/saves large amout of data to-from sql server backend.
Currently this is being used by approx 150-200 users within same country.
We are now planning to roll out this application to larger group (approx 1000 - 2000 users) across large geography (accessible within our VPN) .
1) I am no database expert, hence need few suggestions on what to be considered (technical aspects) on database and front end side for above roll out?
2) Also on other note, if we have luxury to rewrite this app in other technology what would be the best replacement (for eg. aspx - sql ?) considering this app has large number of records to be imported and processed from excel files.