Set up your Currencies with an initial Currency Rate before you set up your Chart of Accounts. Then you can specify the CurrencyID for applicable Balance Sheet accounts when you set them up in the Chart of Accounts.
Ensure your Currency table includes all Currencies you will be using and does not contain any Currencies that you do not use.
Ensure you have at least one Currency Rate specified for each Currency with an Effective Date earlier than any transactions you will be entering or importing.
Use the Currency and Rate maintenance task to add or delete Currencies and specify Currency Rates .