Hello - I have made the following changes to the nsswitch.conf file as suggested by another mailing-list member: Domain = <company>.org ... Method = nsswitch and I have restarted idmapd service. I checked the nsswitch.conf file, and references to sss are mentioned in the following lines: passwd: shadow: group: ... services: netgroup: ... automount: I also ran the following command syntax as root to check the sssd configuration: sssd -c /etc/sssd/sssd.conf -d2 -i The output was as follows: sssd -c /etc/sssd/sssd.conf -d2 -i (Thu Jun 23 10:44:39:600097 2016) [sssd] [add_implicit_services] (0x0040): id_provider is not set for domain [<company>.org], trying next domain. (Thu Jun 23 10:44:39:600411 2016) [sssd] [confdb_get_domain_internal] (0x0010): Unknown domain [<company>.org] (Thu Jun 23 10:44:39:600443 2016) [sssd] [confdb_get_domains] (0x0010): Error (2 [No such file or directory]) retrieving domain [<company>.org], skipping! (Thu Jun 23 10:44:39:600452 2016) [sssd] [confdb_get_domains] (0x0010): No properly configured domains, fatal error! (Thu Jun 23 10:44:39:600458 2016) [sssd] [get_monitor_config] (0x0010): No domains configured. (Thu Jun 23 10:44:39:600483 2016) [sssd] [main] (0x0020): SSSD couldn't load the configuration database. The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.