Crawled Property OFFICE:7 (document template) is not crawled and thus not mapped to managed property

Question

Hi,
our customer (SharePoint Enterprise 2013) wants to crawl the information which Office template was used for creation of a Word/Excel/PowerPoint file for refining in his searchcenter.
We did some research on that topic and found out, that this information should be crawled in the buildin crawled category OFFICE in the crawled porperty 7. But so far any attempts to get any mapping working on this crawled property have been insufficient/frustrating...
What we did:
Map the crawled property to the RefinableString00 Refiner, add this refiner to the refiner web Panel and then do a full crawl. So far the refiner does not show up, and when using the "Query tool" we see that the managed property is empty and not
filled. For Debugging I tried to map nother crawled property to this refiner OFFICE:2 => Title of OFFICE:4 => Author which worked out just fine. So the refiner configuration seems to work but the crawler somehow does not seem to get the template Information
out of my documents. I even opened the uploaded word documents in Word to control if the template Information is correctly readable and you can see in the properties of the file, that normal.dot is filled out.
We even controlled the properties of the crawled property, it´s "isMappedToContents" is set to true.
with Kind regards, I really Do hope someone has a clue
David

Answer 1

All the content which is crawled will be part of search results by default including all the data in the list and documents. Mapping crawl property with Managed property helps if you want to execute a keyword query : Title(column)=SharePoint or
Title;SharePoint
You will typically need to do this kindda mapping if you want to
1. filter data based on column in Advanced Search Web Part
2. Add your custom column as part of search results on result page.
3. Add column based FILTER on Search result page.
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