Unfortunately, the Active Directory Domains and Trusts MMC Snap-in (domain.msc) lets you create an outgoing trust to a Domain Controller (in other words: specifying the name of a Domain Controller as the name of the Domain to trust). Even more unfortunately, you are not able to revert this change by the GUI. If you try to remove this trust, you will get a warning pop-up with the following message:
An internal error occured.
Trying to delete it via netdom
:
netdom trust my.domain.local /domain:dc1 /oneside:trusting /remove /force
also fails with the same message:
An internal error occured.
So how can I delete such a trust object?