Within Exchange, any Distribution Group(s) or E-mail enabled Security Group(s) which contain Lingering Links will impact the OAB (Offline Address Book) generation process causing it to not replicate correctly. While this issue has been around since AD started with Windows 2000, it is a fairly unknown issue and is related to how the OAB (Offline Address Book) Generation process functions.
A couple options exist to fix this issue. You will either need to delete and recreate the impacted group(s), or re-host the Active Directory partition that contains the group(s) with Lingering Links.
Read out the complete blog at http://blogs.technet.com/b/exchange/archive/2011/09/14/how-lingering-links-can-impact-oab-generation-process.aspx
Read my favorites blogs:
Designing a backup less Exchange 2010 Architecture
Step by step guide for upgrading Active Directory from Microsoft Windows 2003 to Microsoft Windows Server 2008
Microsoft Exchange 2010 CAS Array – Steps and Recommendations
Appear Offline in Microsoft Office Communicator Server 2007
Microsoft Exchange 2010 Test cases
Microsoft Exchange Server 2010 Disaster Recovery