[Samba] Trust creation - ERROR: LOCAL_DC: CreateTrustedDomainEx2 - ERROR(0xC00000E0) - The specified domain already exists.

[Emilian Mitocariu]

Turns out there was a remnant LDAP trust account from someone else trying
to create a trust in 2016 and that was triggering the "domain already
exists" error.
After manually deleting that LDAP entry I was able to create the trust.