Location: From India.
I saw it happen a few times at Amazon. Did not seem difficult.
Amazon has a new policy around international relocation now. You can only transfer after spending 1 year in your current org. Other than that, it's a piece of cake. I've seen dozens make the move.
Amazon
As long as you’re not devplanned, you can transfer at any time for any reason.
What's devplanned
Having performance issues
Amazon
Microsoft
Can you please explain why and how