You can work from another country for up to 30 working days in a calendar year, in blocks of no more than 10 days at a time.source 1

Ask your manager at least two weeks before you go, and add the trip to the travel form so payroll can check the tax rules for that country.source 1source 2

A few roles can't work abroad at all because of client contracts. People Ops keeps that list; it last changed in September.source 3