Warning: The selected view could not be shown due to SharePoint throttling. Reverted to the "Explorer View" in order to show content.

We have an email library setup for OPM. For some folders (customer or supplier) the number of emails saved are more than 5,000 however we understand the throttling issue and created many different views (for example last 1 year emails only) so that lower number of emails can be seen in the view. We even made "OPMView01Year" with specific columns. However when we open the OPM in outlook and go to that folder, instead of bringing the result of the "OPMView01Year" which has less than 300 emails but still OPM throws the warning and switches to "Explorer View" which shows the content but not useful for the users.  

OPM must handle this scenario in one of the following ways:
1. Only show the content of the selected view correctly if the items are less than 5,0002. If OPM is switching to its hardcoded "Explorer View" by downloading the content from SharePoint then it should also download the related columns and show it accordingly.
Otherwise the view is useless for the users and defeats the purpose of using OPM.

Our admin staff frequently use Adobe Acrobat Pro to manipulate and combine multiple MS Word files into one PDF. Doing this natively from within the Adobe product (by pasting a link to the SP library in the file browser dialog) opens the MS Word file as a temp ‘pdf’ which can then be manipulated as required or they can be individually opened from the ‘combine files’ dialog box. It is easy to then save the pdf to their SharePoint library using OnePlaceDocs (great) but they would also like to easily open the MS Word files without having to find the URL and paste each time. They’ve tried this and found the following limitations when using OnePlaceDocs:

Double clicking a single MS Word Doc to open via OnePlaceDocs within Adobe opens the file in MS Word.
Highlighting a single MS Word Doc, selecting ‘Open With’ and choosing an Adobe Acrobat results in an error message.
Selecting multiple MS Word files greys out the Open With option.

We're using client version 7.7.0 with SP2013 on prem.

Is there something I can change in the configuration tool to make the MS Word files open with Adobe products?

Many thanks in advance

Jenny