I was on L-1A and later switched to H-4 EAD 3 years back (working with the same Indian multinational company for 15+ years). I manage a large team here in the USA, and some of my reportees are in the U.K. Since the H-4 EAD extension is taking time, my company plans to move me to Canada for one year. As per the plan, I will be back to the USA on an L-1A visa, and then the company will file for my green card in the EB-1C category. I don't have any team in Canada, and I will mainly manage the same U.S. and U.K. team from Canada.
The USCIS will consider the broad range of your duties within the business context, including employees being supervised and managed in countries other than the USA (or Canada). In our experience, the USCIS looks at whether the benefit of the work you perform with your dispersed team flows to the petitioning employer and the corporate group, department, or division within the L-1/EB-1C equity/control relationship. But, of course, your particular facts need to be examined in context. So have your lawyers look at them very carefully.
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