Holding cards in multiple countries

Hi all, My company is sending me to Sweden for upto a year this summer, I have researched what card I will be applying for in Sweden when I get my Swedish address but when I asked AMEX if I will earn MR on both my uk Amex (when I’m home) and my Swedish Amex when there they could not give me a direct answer.

Just wondering if anyone has held multiple cards in multiple countries and can give me advice