Join of a backupserver failes in 91univention-saml.inst
Join failes with:
Successfully downloaded the sys-idp-user credential file
Could not chdir to home directory /dev/null: Not a directory
scp: /etc/univention/ssl/sso.schein.de: No such file or directory JOINERR:FAILED: /usr/lib/univention-install/91univention-saml.inst
Make sure on your master and your backup server the certificate is in place in: /etc/univention/ssl/sso.schein.de
The joinscript tries to get the certificate from the master, but this does not work. You can set the ucr variable ucs/server/sso/certificate/download to no so this is no longer tried, but the certificates have to be copied to the backup.