Download page Opportunity Record Fields and Advanced Currency Management.
Opportunity Record Fields and Advanced Currency Management
Advanced currency management (ACM) is optional Salesforce functionality that must be enabled directly by Salesforce, to allow you to manage dated exchange rates on opportunity records.
When ACM is enabled in your org and being used on opportunities, you cannot use any Opportunity object fields that are of a Data Type of Currency in your intelligent approval emails or on the approval summary page. This includes the standard Amount field and any custom fields using the currency type.
If you want to have currency type field information in your emails, you cannot have the values within the content of the email. You would need to have links back to the opportunity record itself in the email and users would have to view the date within Salesforce.