Besides it own internal user database, Syncplify.me Server! can authenticate users against the Windows user database and/or the Active Directory.
This article explains how to authenticate users against the Windows user database. A different article explains how to use the Active directory.
A Windows user, in Syncplify.me Server!, is just like any other user; the only difference is that when he/she tries to log in, his/her credentials will be relayed to the underlying Windows system for authentication.
In the example below, you already have a Windows user profile, whose username is “test“, and you want to allow such user access to Syncplify.me Server!
In order to do so, just create a user profile in Syncplify.me Server! with the same username as the existing Windows user, and select “authenticate using Windows / AD” from the drop-down list indicated by the purple arrow in the picture.
When authenticating against the Windows user database, you can leave the password field blank in Sycnplify.me Server! as it wouldn’t be used anyways.