I had hoped for a quick fix by Microsoft, otherwise I would have posted this earlier…
A while back I published a white paper on how to run a backup solution using FileTables. Please be aware that this solution currently only works if you use SQL Server 2012 on Windows Server 2008 R2. Reason for that is a bug in Windows Server 2012 that causes FileStream not to work in conjunction with AlwaysOn Availabililty Groups. (The solution will look fine in the management tools, but the FileStream will not be available via the AGs listener.)
I’ll put a post up once a hotfix is available.
