Troubleshooting AD Replication & Lingering Objects

Some handy links for better understanding the troubleshooting of AD replication, Lingering objects and their removal, with a guide coming soon.

Removing Lingering Objects

Information about Lingering Objects in an AD Forest
 https://support.microsoft.com/en-us/kb/910205

Removing Lingering Objects
http://blogs.technet.com/b/askds/archive/2014/09/15/remove-lingering-objects-that-cause-ad-replication-error-8606-and-friends.aspx

Fixing Lingering Object Problems
https://technet.microsoft.com/en-us/library/cc738018%28v=ws.10%29.aspx

Strict Replication Consistency 

Contrary to popular belief, Strict Replication Consistency isn't enabled by default on DCs that reside in forests upgraded from 2000 functional levels
http://blogs.technet.com/b/askds/archive/2010/02/15/strict-replication-consistency-myth-versus-reality.aspx

Troubleshooting Replication

AD Replication Status Tool
A very useful tool for troubleshooting replication, think of repladmin but in a GUI and more.
http://blogs.technet.com/b/askds/archive/2012/08/23/ad-replication-status-tool-is-live.aspx

ReplDiag
http://activedirectoryutils.codeplex.com/releases/view/13664