If everything works correctly, a record should appear: Authenticated to Kerberos v5
Look at my two screenshots from two Openfire servers (First server on Ubuntu 16.04 and second server on Ubuntu 18.04)
My company uses only Windows 10, but we implemented SSO even when we had computers with Windows 7 and Windows 8.1.
Give me time, tomorrow I will install a virtual machine on Windows 7.
By the way, try putting the krb5.conf file in C: \ Windows and reboot computer .
And also make sure that every Windows client has this registry entry from point 4.1, it is very important : HKEY_LOCAL_MACHINE \ System \ CurrentControlSet \ Control \ Lsa \ Kerberos \ Parameters
Value Name: AllowTGTSessionKey
Value Type: REG_DWORD
Value: 1
hmm, I have SSO running on Windows 7.
And without the krb5.conf file.
I just added a reg entry from point 4.1
Do you use the latest version of Spark 2.8.3?
very strange error.I would try to write on problem computers and look at which domain the controller is connected to and also check dns on the problem computer nslookup srvchat.pmns.intranet
If you are an administrator on your computer, then Spark.exe needs to be run with elevated privileges (Run as Admin). If you have the rights of a regular user, then everything will work for you.
This is a longstanding issue of UAC and Java.