> It turned out that this is the solution:
> https://github.com/mbooth101/openldap
> That allows you to build it using native Windows tools (like Visual Studio
> command prompt) so there is no risk of running into linking or other
> problems later on.

Can you explain to us what you mean by 'solution'?

I had a quick look at that URL and see no reference whatsoever about overlays, backends (e.g. ODBC, DB, SASL), dependencies (e.g. OpenSSL) and tests (approx. 70 tests)?