SAP Message V2096 - EURO Customizing is missing

Diagnosis
You want to change the document currency of a partially billed salesdocument into EUROs. You cannot make the change because the Customizingsettings for the EURO have not been maintained.

Precondition
You can only change the document currency of a partially billed salesdocument if:
Customizing for the EURO has been maintained
The currency you want to use is participating in the EURO

Procedure
Confirm, or maintain your Customizing settings for the EURO accordingto message MQ 426 in the change transaction.

549866FAQ: Currency changeover to euro in orders (Sales)
398883SD: Euro changeover returns error V2096
394178Currency changeover to euro in sales orders (sales)
1114424Local currency changeover: Currency conversion of sales docs