Sophos Connect Authentication failed | Sophos VPN SSL Client works

Hello,

since the last firewall update we are forced to use the new Sophos Connect.

Sadly there are connection problems with this client.

I can properly connect via the old VPN SSL Client. If i uninstall it and install Sophos Connect the authentication fail.

I didn't change anything on the firewall (UTM9 SG210) yet.

What i see in the logs is maybe a problem with ad authentication.

Via the old client it searches and find our first dc and establish the connection (ip is an example)

severity="info" sys="System" sub="auth" name="Trying 192.168.0.1 (adirectory)"

Via the new client it goes through the entire list of DC Server and finally failes

severity="info" sys="System" sub="auth" name="Trying 192.168.0.1 (adirectory)"

severity="info" sys="System" sub="auth" name="Trying 192.168.0.2 (adirectory)"

severity="info" sys="System" sub="auth" name="Trying 192.168.0.3 (adirectory)"

Do i have to change anything regarding the ad connectivity with the new client?

I don't want to exclude the old ones in any way.