According to the knowledgeable Tony Payne from IBM L3 Sametime Support:
"In WebSphere Application Server 126.96.36.199 - they 'changed' the rules for how Domino LDAP gets configured - WAS tried to allow for "blank" - but to do that, you leave both the unique name and the distinguished name 'blank' - that should pass. If you're going to manually configure it - you have to provide a root. You could also copy your wimconfig.xml from your SSC Cell to the Meeting Recording Capturer/Renderer node."
So with that being said, copy the following file from your Sametime System Console Deployment Manager:
and restart your WebSphere Application Server.