diff --git a/environments/production/modules/bootstrap/files/authentication/etc/sssd/sssd.conf b/environments/production/modules/bootstrap/files/authentication/etc/sssd/sssd.conf
index 46f0ac7..4e7c976 100644
--- a/environments/production/modules/bootstrap/files/authentication/etc/sssd/sssd.conf
+++ b/environments/production/modules/bootstrap/files/authentication/etc/sssd/sssd.conf
@@ -12,10 +12,18 @@
 cache_credentials = True
 id_provider = ad
 krb5_store_password_if_offline = True
-default_shell = /bin/bash
 ldap_id_mapping = True
+default_shell = /bin/bash
+
+# the following worked for 18.04 LTS, but not 20.04 LTS
+#fallback_homedir = /home/%u
+
+# the following does work in 20.04 LTS
+override_homedir = /home/%u
+
+
+# use simple names rather than student@student.otago.ac.nz
 use_fully_qualified_names = False
-fallback_homedir = /home/%u
 
 # create private groups for users
 auto_private_groups = True