[Samba] centos7, samba, winbind, ad 2012, NT_STATUS_IO_TIMEOUT

[Stefan Fuhrmann]

Hello all, 

Im on the latest fresh installed centos7 with samba / winbind 

samba: 
Architektur : x86_64 
Version : 4.2.10 
Ausgabe : 6.el7_2 

Name : samba-winbind 
Architektur : x86_64 
Version : 4.2.10 
Ausgabe : 6.el7_2 

doing wbinfo -i user is working 
doing wbinfo -g is working 
doing wbinfo -u is not working and I get in winbind log: 
NT_STATUS_IO_TIMEOUT 

and Im not able to access shares with ad user. 

I searched around but was not able to find a solution. 

More info needed? 
Can someone help? 

Tia 
Stefan