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Description of problem:
When IPA master is backed up and then restored, authentication does not work until SSSD caches are clear and restarted. Guide should have a note about it.

Related freeipa-users thread with more information:
https://www.redhat.com/archives/freeipa-users/2015-May/msg00493.html

Version-Release number of selected component (if applicable):
ipa-client-4.1.0-18.el7_1.3

Document URL: 
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Linux_Domain_Identity_Authentication_and_Policy_Guide/restore.html

Jakub, I would welcome your advice what is the recommended procedure for restoring SSSD/clearing the caches causing FAST CCACHE issues in the referred thread.

Right now, the user simply used:

    systemctl stop sssd
    rm -f /var/lib/sss/db/*
    systemctl start sssd

Also rm /var/lib/sss/pubconf/* and /var/lib/sss/mc/*

You could go as far as:
# find /var/lib/sss/ ! -type d | xargs rm -f
As everything except the directories can be recreated, but that's probably an overkill.

Published in an asynchronous update.