Printing fails for printers connected to a Windows print server

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Environment

SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server 12 Service Pack 1 (SLES 12 SP1)

Situation

When attempting to print to printers configured via "YaST > Hardware > Printers" that connect to a Windows print server this fails after entering credentials with the following logged in "/var/log/cups/error_log":

E [8/Jun/2016:10:10:14 +0100] [Job XX] Session setup failed: NT_STATUS_UNSUCCESSFUL
E [8/Jun/2016:10:10:14 +0100] [Job XX] Session setup failed: NT_STATUS_LOGON_FAILURE
E [8/Jun/2016:10:10:14 +0100] [Job XX] Session setup failed: NT_STATUS_ACCESS_DENIED

Resolution

In the "[libdefaults]" section of the "/etc/krdb5.conf" file the following entry needs to be added:

default_ccache_name = FILE:/tmp/krb5cc_%{uid}

Cause

The problem is caused due to non fitting KRB5CCNAME default locations of MIT Kerberos as offered by SUSE Linux Enterprise Server 12 (SLES12) which points to "/run/user/%{uid}/krb5cc" while expected from winbind is still the old location "FILE:/tmp/krb5cc_%{uid}".

Additional Information

Note: Printing is only an example. This configuration changed is needed whenever winbind is used!
The issue is caused by winbind and kerberos expecting different locations for the cache

Disclaimer

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