In Exchange 2003 server, RUS's main job is building the address lists.
However, RUS also creates the email address that you see on the user's properties sheet.
Solution: Error ONE: Ignore the error “[2/16/2015 AM]  [ERROR] The operation could not be performed because object ‘exchserver01’ could not be found on domain controller ‘adserver01.domain.com’.” Just proceed with starting the Windows Firewall service and rerun the update of Service Pack. You will not be able to delete the Recipient Update Service (Enterprise Configuration) by using Exchange 2003 or Exchange 2000 System Manager.
Perform the following steps to delete the Recipient Update Service (Enterprise Configuration) by using ADSI Edit (Adsi Edit.msc): This entry was posted on Sunday, February 15th, 2015 at pm and is filed under Exchange Server.
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Most likely Exchange 2003 wasn’t decomm-ed properly (if you are no longer using Exchange 2003).We need to remove Recipient Update Services using in the process of migration to Exchange 2010 Exchange 2010 no more uses Recipient Update Services to Stamp the Email Address So We don’t need to rehome the Recipient Update Services Where we can Delete it You can Open Right Click – Connect to – Chooose Configuration Partition Configuration – Services – Microsoft Exchange – First Organization (Default ORG name) -Address lists Container — Recipient Update Services – You can Remove the RUS Enterprise RUS and Domain RUS (You can Delete it ) Great !Some acronyms just trip of the tongue - RUS (Recipient Update Service) is a case in point.If the administrator chooses to change a policy using 'Rebuild' or 'Update Now' options, then valid user addresses may be accidentally overwritten, causing SMTP addresses to be changed for each user.linkid=34707.] Microsoft® Exchange Server 2007 or Exchange Server 2010 setup cannot continue because the Recipient Update Service (RUS) responsible for a domain in the existing Exchange organization cannot be found.