You can't use web check-in from Amsterdam. You check in old school style at the airport.
Web check-in is currently available on the following routes:
All flights between Ireland and the United Kingdom.
All flights from Ireland to Continental Europe.
All flights between Ireland and the USA. Flights operated by our codeshare or interline partners are not eligible for online check-in.
All flights from Alicante, Athens, Barcelona, Berlin, Bilbao, Bologna, Bordeaux, Brussels, Bucharest, Budapest, Catania/Sicily, Copenhagen, Corfu, Dubrovnik, Düsseldorf, Faro Algarve, Frankfurt, Fuerteventura, Geneva, Gran Canaria, Hamburg, Helsinki, Ibiza, Izmir*, Lanzarote, Lisbon, Lyon, Madrid, Malaga, Marseille, Milan/Linate, Munich, Nice, Palma Majorca, Paris, Perpignan, Prague, Rome, Salzburg, Stockholm, Stuttgart, Tenerife, Toulouse, Venice, Verona, Vienna, Warsaw and Zurich.