WinRM Connection Error ntlm timeout

[Rai Ner]

Dear all, 

I have two Ansible Systems, identically configured to access a windows host. 

For one it is working fine, for the other I get this timeout error: 

<xxxvm64.xxxad.xxxgmbh.de> ESTABLISH WINRM CONNECTION FOR USER: xxxad\Administrator on PORT 5985 TO xxxxxm64.xxxad.xxxxmbh.de
<<xxxvm64.xxxad.xxxmbh.de> WINRM CONNECTION ERROR: HTTPConnectionPool(host='xxxvm64.xxxad.xxxbh.de', port=5985): Read timed out. (read timeout=30)

I am using this basic connection parameters (same configuration on both systems): 
ansible_connection: winrm
ansible_user: xxxx\xxxxx
ansible_password: xxxxx
ansible_winrm_transport: ntlm
ansible_port: 5985
#ansible_winrm_operation_timeout_sec: 200
#ansible_winrm_read_timeout_sec: 320

- Network connection to Port 5985 is fine. 

- Winrm services are running as required. 

- Extended timeout values, but without luck. 

Is there a way to debug this on windows side ? 

Any ideas are very appreciated

Best regards, 

Rainer