Marvin Ericson:

I use an API to get windows user name with User.Identity.Name.

in browser it is working, but when I call it from Angular 4 project it returns error 401 unauthorized.

any ideas please?

EDIT

Here the code below:

getWinUser(): Observable {

     const headers1 = new Headers({'Content-Type': 'application/json'});
     const options1 = new RequestOptions({ headers: headers1, withCredentials: true });
    return this.http.get('http://seserv112/winauth/api/winuser', options1)
         .map(sub => sub.toString());
}

showWinUser(): string {

    this.getWinUser().subscribe( response => {
            this.user = response;
        //   console.log('resp :' + this.resp);
            console.log('user is : ' + this.user)
        });
           return this.user;

}