When viewing the Recent Conversations in the IIM client, they keep refreshing the list over and over.

If the Recent Conversation keep refreshing over and over when viewing them.

On the Server, Open the registry and go to:
HKEY_LOCAL_MACHINE\SOFTWARE\Ipswitch\Messenger Server\Domains\<affectedDomain>\Users\<AffectedUserName>\LeftConversations

On a x64 System:
HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Ipswitch\Messenger Server\Domains\<affectedDomain>\Users\<AffectedUserName>\LeftConversations

Then delete the entries under that key.