Your family has to reach an Austrian Embassy. There, the family will apply for family reunification. There is no Austrian Embassy? Your family will need to reach an Austrian Embassy in another country.
Example: Your family lives in Syria. There is no Austrian Embassy at the moment. For the application for family reunification your family has to reach Lebanon, Jordan or Turkey.
The application for family reunification needs to be applied for at an Austrian Embassy. Your family cannot apply at another embassy (of another state). Here you will find all Austrian Embassies: Austrian Embassies
For the application for family reunification the family needs an appointment at the Embassy. The family needs to ask for an appointment. The embassy will then inform when the family can go. How long the family must wait for an appointment depends on each embassy.
You received a positive answer. But the family cannot go to the embassy in the next 3 months? The family can apply also per E-Mail at the Embassy. Please contact an advisor.