mount_webdav https with NSTask with user credentials

Question

I was trying to mount a webdav share (Windows Server 2008r2) over NSTask. But had no luck.

    NSString *server = @"https://domain;username:password@SERVER.tld:443/WDAV";
    NSString *mountpoint = @"/Users/me/Desktop/MountPoint";

    NSTask *task = [NSTask new];
    task.launchPath = @"/sbin/mount_webdav";
    task.arguments = @[server, mountpoint];


    [task launch];
    [task waitUntilExit];

    int status = [task terminationStatus];
    if (status == 0) {
        NSLog(@"Mounted to Server");
    } else {
        NSLog(@"Mounted to Server failed with status code: %i", status);
    }

Exit Code is always 22.

When I try to connect over Terminal then I use /sbin/mount_webdav -i "https://SERVER.tld:443/WDAV" "/Users/me/Desktop/MountPoint"

An prom appear where I must type username in my case domain\username and password. Works fine over Terminal, but over NSTask I have no idea.