Since Microsoft US and Microsoft Ireland are to two different entities. The former is a 100% shareholder of the second but technically there is an Irish CEO tha

Since Microsoft US and Microsoft Ireland are to two different entities. The former is a 100% shareholder of the second but technically there is an Irish CEO that is report to Irish board representing the owner of the Irish Microsoft company. The Irish company doesn't operate in the US. Should the US judge send a letter rogatory to an Irish court to get the evidence?