Hi paulstonge,
If you're trying to transfer accounts from one Fund Manager portfolio to another, you can use copy/paste, as all of the sub-portfolio properties are transferred when copying/pasting. Another possibility is to create a Custom report or Investment Transactions report with account numbers, and then
transfer this report to Excel. The Investment Transactions report can be customized to choose which fields to display using "Options / Report Preferences... / Investment Transactions", so you can sort of generate your own generic export.
A generic export is on our list of new features to consider, but it hasn't been implemented yet.