Best Practice: Inter Company Group Buying / Selling in different currencies

[Harry]

Baseline: Three¹ companies with individual currencies buy stock internally from each other. They are under one management in ERPNext.
Q: What is the best practice for this issue in ERPNext?

¹Does the company count matter?

Unsolved similar issue:

Multi-Company with Multi-Currency Issue: Cannot create "Inter Company Invoice" if companies have different "Default Currency"

Our set-up: Company A (default currency INR) and Company B (default currency USD). (both company A and company B are wholly owned by a Group Company C) Our use case: Company A sells goods to Company B and we need to create an “Inter Company Invoice”. We followed the step-by-step instructions at the official docs below: https://docs.erpnext.com/docs/user/manual/en/accounts/inter-company-invoices We get the error message: “Company currencies of both the companies should match for Inter Compan…

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