Cleaning up the domain trust

Open Active Directory Domains and Trusts.
Right-click your domain and click Properties.
Select the Trusts tab.
Select the outgoing trust for the FreeIPA domain and click Remove.

Figure 1. Remove the outgoing trust for the FreeIPA domain
1. If the trust is inactive, you must click Yes to confirm its removal.
  
  Figure 2. Confirm inactive trust information removal
2. If the trust is still active, select No, remove the trust from the local domain only, and click OK to confirm its removal.
  
  Figure 3. Confirm active trust information removal
Select the incoming trust for the FreeIPA domain and click Remove.

Figure 4. Remove the incoming trust for the FreeIPA domain
1. If the trust is inactive, you must click Yes to confirm its removal.
  
  Figure 5. Confirm inactive trust information removal
2. If the trust is still active, select No, remove the trust from the local domain only, and click OK to confirm its removal.
  
  Figure 6. Confirm active trust information removal

You have successfully cleaned up the domain.