I have a 2 server Windows 2008R2 cluster that has been running 3 instances of SQL Server 2008 and 4 instances of SQL Server 2012 for many months without problems. We added
a third server to the cluster and I've been able to add all 4 SQL Server 2012 instances to this server using the 2012 "add a node to an existing SQL Server failover cluster" wizard. When I try to add the SQL Server 2008 instances using the 2008 wizard,
only 1 instance appears in the Cluster Node Configuration dropdown (which installs fine). The other 2 instances are not found. Is there a registry, configuration, or AD setting that is missing on this server? The cluster validation report was run and
indicates warnings but not errors.
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