If you have Multi-currency enabled and you insource a ticket from a lead partner in another currency, the following occurs:
When outsourcing between two Autotask instances, currency amounts will always be passed between the systems in the internal currency. The Billable Amounts of charges will be calculated on the insourcer's end using the exchange rate at the time the ticket is accepted from the outsourcer.
If the insourcer does not currently have an account configured for the outsourcer when a ticket is accepted, an account is automatically created for them. If the insourcer has Multi-currency enabled, this account will be set to use the internal currency of the insourcer by default.
NOTE Change the currency for the outsourcer's account to match the outsourcer's internal currency before any items are approved and posted. This will make invoicing the outsourcer a lot smoother.