One thing I've noticed is your request doesn't match your client_id.
```
https://gluuserver.local.com/oxauth/authorize?scope=openid email profile user_name&response_type=code&redirect_uri=https://soapui.local.com/redirect_uri/client&state=init&client_id=@!4EBC.D627.F870.920A!0001!3887.46C0!0008!333B.CF73.90B1.45E
sessionAttributes={auth_step=1, acr=auth_ldap_server, remote_ip=192.168.0.17, scope=openid email profile user_name, response_type=code, redirect_uri=https://soapui.local.com/redirect_uri/client, state=init, client_id=@!4EBC.D627.F870.920A!0001!3887.46C0!0008!333B.CF73.90B1.45E6}, persisted=true}
```
```
client_id=@!4EBC.D627.F870.920A!0001!3887.46C0!0008!333B.CF73.90B1.45E
client_id=@!4EBC.D627.F870.920A!0001!3887.46C0!0008!333B.CF73.90B1.45E6
```
The 6 was dropped and isn't a proper quad. This might explain why it couldn't be found in the LDAP.