In administrations the currencies of documents are recognized and assigned recognition scores.
It can be configured whether the recognized currency should be used in transactions or whether the master data should be used (default setting). Go to Manage / Environment / Administrations and then click 'Edit' for the administration. Under the tab 'Preferences' the option 'Determine currency of transactions based on master data' can be checked or unchecked.
please note: for all administrations the requirement applies that the currency codes from your accounting package must be in ISO 4217 format. If for example USD is recognized, then a currency with code USD must exist.
Lite administrations (phasing out): in these the recognized currency is applied by default.