Setup: There is a Active Directory domain and an computer not member in this domain. You try to manage this domain with Active Directory Users and Computers and try to run it with “Run As…”.
Problem: You receive this error: The Security database on the server does not have a computer account for this workstation trust relationship.
Open a command prompt and run this command
runas /netonly /user:<domain>\<User> "mmc dsa.msc /server=fqdn.of.domain.controller"
Prerequisites: Active Directory