Import from Microsoft Word -- MS Office Bibliography XML format
JabRef supports the MS Office Bibliography XML format for exporting and importing.
Howto: Export to Microsoft Word
As you are using JabRef already, you can simply use the builtin export functionality for Office 2007 xml format, that is the format where Microsoft stores it bibliography information.
Export (selected) entries in JabRef and choose Office 2007 xml format
Open Word, click on the References Tab
Click on Manage sources -> Browse -> Open the exported XML File (or better copy it directly to the location under browse)
All entries are then available in the MS bibliography database
The only problem in the export could be when you have a "company" as author. That is simply exported as author and not in the company field.
More discussion at https://tex.stackexchange.com/a/351452/9075.
Howto: Import from Microsoft Word
See https://stackoverflow.com/a/4628718/873282
Entry Type Mappings
Some field names in the XML format differ from the field names in the BibTeX/BibLaTeX format and can therefore be not directly mapped between the formats. Therefore this help file provides a list of all field mappings.
Field mappings
The field mapping for import and export is mostly the same, but there are some differences, as not all field exists in both formats. Additionally, some fields have to be treated differently during import/export.
BibTeX/BibLaTeX only fields
The following fields are BibTeX/BibLaTex only fields, they have no representation in office XML. In the resulting XML file they are represented with the prefix BIBTEX_
The XML field SourceType contains the associated entry type from the first table, while the original BibTeX/BibLaTex entrytype is preserved in the field BIBTEX_ENTRY.
MS-Bib only fields
The following fields are XML-only fields, they have no BibTeX/BibLaTex representation: In the resulting bib database they are represented with the prefix msbib-.
Special Export treatment
The following fields are treated as follows during export:
Special Import treatment
The following fields are treated as follows during import:
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