Exchange 2010 uninstall: This computer is responsible for expanding the membership of 1 distribution group(s).  These must be reassigned to another server before Setup can continue.

Issue

When removing an Exchange 2010 server from an organisation I was faced with the following error.

This computer is responsible for expanding the membership of 1 distribution group(s).  These must be reassigned to another server before Setup can continue.

Ex2010-Uninstall-DistError01

There are no Dynamic Distribution Groups in this organisation, confirmed by running Get-DynamicDistributionGroup.

Ex2010-Uninstall-DistError02

Resolution

Using ADSIEdit, connect to the Configuration naming content.

Navigate to the Servers container.

  1. CN=Services
  2. CN=Microsoft Exchange
  3. CN=X500 (the name of the Exchange Organization)
  4. CN=Administrative Groups
  5. CN=Exchange Administrative Group (FYDIBOHF23SPDLT)
  6. CN=Servers

Right click on the relevant Exchange Server (e.g. CN=X500EX01) and edit the properties. 

Find the legacyExchangeDN attribute, edit it.

Ex2010-Uninstall-DistError03

Clear the legacyExchangeDN.

Ex2010-Uninstall-DistError04

Set the value to be the name of the Exchange server (e.g. X500EX01).

Ex2010-Uninstall-DistError05

Apply the change.  Retry the uninstall & this time it should be successful.

Ex2010-Uninstall-DistError06

 

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