Bug: export to Word is corrupt (exported files cannot be 'compared').
Prior to mid December 2016 it was possible to create a file in Indesign, export it to Acrobat, export it from Acrobat to Word and then compare it in Microsoft Word (Office 365) with another file that has been subjected to the same workflow.
Since some stage in 2017 an incompatibility was introduced and this workflow ceased to work.
I have tested this workflow by comparing the Word files produced in Deltaview/Workshare and the comparisons are unstable and unusable, so the problem is not just with Microsoft Word's comparison engine (which works fine with files created within Word).
The issue manifests itself under Windows 10 and MacOS High Sierra, it also manifests itself with a text file exported from Photoshop, to Acrobat and then through to Word. The comparison file produced by Word is wildly inaccurate (two different files are stated not to have any differences between them, or all the text is shown as having been altered when that is not the case) and the files are extremely unstable (sometimes being reported as having 0KB and sometimes reaching over a GB).
As the comparison function is Acrobat will not produce a word-for-word redline, this bug is a really serious problem when a long text book is produced in Indesign and tables of statutes and indexes are produced by the publisher outside Indesign.
I can supply full details and sample files on request (and have spent many hours looking into this both on my own and with Adobe technical support).
Can Adobe please fix this as matter of urgency.
Gerald Montagu commented
I have just completely by chance found a fix for anyone else who has this problem. Try exporting your file from Indesign to a PDF. Then, open that PDF in Word for Windows. You should then have a fully stable Word file that you can work with (including running comparisons). The key seems to be that Word's import process works completely differently from Acrobat's export process - it will be very evident that the file is structured completely differently. The difference in the end results is so great, that it must be strongly arguable that when Adobe claim Acrobat 'exports' to Word they are effectively misselling. Please note that this fix does not seem to work if you try to open the PDF in Word for Mac (as at September 2018) because the import process is (sadly) nothing like as refined as it is in the Windows version.