The Genlias Monitor is a free service for genealogists who automatically want to receive new additions to Genlias, the database of the Dutch national archives, to complement their genealogy.
When will all the data be available in the system? - from the Genlias FAQ
All the participants in Genlias have agreed to prioritise the entry of marriage records. Most provinces have already entered a large number of records. Smaller provinces like Flevoland and Drenthe have an advantage in this respect. Provinces such as Noord-Holland and Zuid-Holland, containing major cities like Amsterdam and Rotterdam, have a lot more work to do. So at this stage we are unable to provide a definitive answer to this question.
If you want to know for which places Genlias has data you can use the Places in Genlias page to look it up.