Short answer HubSpot's KB: with multiple currencies, turn on automatic exchange rate updates monthly, quarterly or annually. Turning it off asks you to type Confirm. 1. In HubSpot The relevant screen in my demo portal. Time zone (1) and fiscal year (2). 2. Worth knowing Read what changes when the setting is turned off. 3. Related Account defaults. Sources HubSpot Community question: Set up your Exchange account HubSpot Knowledge Base: Automatic exchange rate updates