1. Login to your IONOS account.
2. Select your domain from the dashboard.
3. Click on the "Domains & SSL" section and then select "Manage Domains".
4. Click on your domain to see its settings.
5. Look for the "DNS" option and click on "Edit".
Note: This might be in a "Domain Settings" area.
6. Click on "Add record".
7. In the "Type" dropdown, choose CNAME.
8. In the "Hostname" field, enter @. In the "Points to" field, enter memberpages.app.
9. Set the "TTL" (Time to Live) to default (usually 1 hour).
10. Click on "Save".
Repeat Steps 6-10 for any additional subdomains you want to point to Member Pages.