SQL Server Attachability issues

Hi all,

Using AppAssure 5.3.6.  I have 9 SQL Clusters that are being backed up andAppAssure recognizes all 9 as being SQL Clusters.  Of the 9, I am able to do nightly attachability checks on only 2 of them.  Also, on the 7 that aren't doing the nightly, the Force Attachability Check is not available on the recovery points.  I have removed the clusters from protection and re-added and have restarted the agent on each of the cluster nodes.  I have not re-started the core.  Anybody have any ideas?  

Please help.
Thanks!

I didn't find the right solution from the Internet.

References:

https://www.quest.com/community/products/rapid-recovery/f/forum/19565/sql-server-attachability-issues

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