Lingering objects in Active Directory are a pest, and require a lot of work to properly dispose of them. Luckily, there's repldiag.exe, part of Active Directory Utils. This particular tool resolves lingering objects by automating the required procedure and set of commands to run to clean up lingering objects.

In normal circumstances, you would have to look up and run various commands to completely clean out the AD database on each DC. Using repldiag.exe does the hard work for you by looking up the DC's and running the clean up on each DC, cross-referencing with the other DC's, and it does so by using the built-in commands and API's (such as those used by repladmin and other commands).

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