Openfire 3.7.1, win32
< 1,000 registered users, typically < 100 users logged in at any given time
org.jivesoftware.openfire.ldap.LdapGroupProvider - Groupname %SomeGroupRemovedFromAD% not found
This error is logged numerous times every minute, which is ultimately causing stability issues. Apparently this was a result of removing groups in AD that were being used as contact lists. I was able to solve this problem by temprarily recreating the groups in AD so that I could disable the contact list group sharing attribute in the Openfire Admin console.
I figured out the solution half-way through creating this post, but I wanted to submit it anyway in case anyone else runs into this problem down the road.