Using the Configure Role option in Failover Cluster Manager on Server 2012 R2. After selecting Virtual machines from the list, upon enumeration I receive the following error:
"An item with the same key has already been added"
I've looked at other solutions to this issue but they are unrelated. Some mention firewall configuration and others network card guid on VM. I can create a blank VM (no operating system and no NIC) with the same results.
This error appears even if there isn't a non-highly available VM to be converted to highly available (which i've run in the past and it will just enumerate nothing).
Tied to this error is the fact that when I do try to create a highly available virtual machine, the wizard completes but the virtual machine is created as non-highly available with no error given. This is when I tried the Configure Role option and get the error listed above (assuming both are related to each other somehow).