- In the Kentico Client portal, request a domain alias license key for promotiondomainexample.com
- Add the license key to Kentico
- In Sites, select the domain1example.com site and add 2 domain aliases to it.
- In the new dialog add promotiondomainexample.com and set the redirect to domain1example.com/promotion.
- The second alias should have www.promotiondomainexample.com and redirect to domain1example.com.
The above is assuming you do not use WWW in front of your domain. If you use WWW in front of your domain add it to the redirect domain.