Hello,
thanks for your answers.
I have attached the export of the AccessTracker.
Yes, clients are connected and sometimes this error occurs after being asked to reauthenticate. Before and after, the clients work perfectly.
The error occurs with all machines in the company, very rarely with around 2 machines per week.
We have only specified the computer object as the authentication mode in the 802.1x authentication of the network card via group policy (see appendix "8021X").
The local user on the PC is a standard user and not employee-specific.
Strangely enough, it can read out the AD groups and assigns the correct vlan to the PC, so the AD should in principle recognize the PC as valid.
Friendly greetings,
Nicolai