If you are established in the Netherlands and receive a visit from a foreign business partner who intends to stay for less than 3 months, they may have to apply for a short-stay visa (Schengen visa), depending on their nationality. They can apply for this visa at the Dutch embassy or consulate in their country.
In some cases your foreign business partner may need an invitation letter from you in order to obtain a visa. This depends on the local circumstances in their country. You must send this letter to the Dutch embassy or consulate in your business partner’s country. The websites of the Dutch embassies often provide information on the contents of the letter.