Exchange 2007 CCR cluster has one single node.
Will QMM 8.3 or QMM 8.4 be able to work with this cluster?
QMM was designed to work with CCR clusters which have 2 nodes, Quest KB article SOL47683 explains how QMM 8.x handles a CCR cluster:
By design a second node is expected and all data needs to be copied/synchronized to the second node.
Missing second node causes QMM to malfunction.
Single node CCR cluster is not supported and QMM 8.x cannot be used when working with such a cluster.