I think you should ignore those for now and check the updated situation (MP). Both the article of Kevin and the post of Graham are referring to the SQL free Space Monitoring, defined within the old management pack. Now there is a new MP, which has been re-written:
Please go through the guide and check what it exactly mentions.
One more thing - it si recommended to create "Index Rebuild" Job, so that the Indexes can get rebuild overnight:
This will also be interesting to you:
Hope I was able to help.
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