Microsoft Corp on Thursday said it proposed a program to U.S. President Donald Trump's administration allowing people from seven predominantly Muslim nations to enter and leave the United States on business or family emergency travel if they hold valid work or student visas and have not committed any crimes. In a letter to Secretary of Homeland Security John Kelly and Secretary of State Rex Tillerson, Microsoft President Brad Smith outlined a program for case-by-case review of exceptions to a travel ban instituted last week. Microsoft is the first major U.S. company to press the government to create a formal program that would ease the ban for foreign-born workers who do not have permanent residence in the United States.