Index: 96univention-samba4.inst
===================================================================
--- 96univention-samba4.inst	(Revision 55610)
+++ 96univention-samba4.inst	(Arbeitskopie)
@@ -493,6 +493,9 @@
 		/usr/share/univention-samba4/scripts/sysvol-sync.sh
 	fi
 
+	## flush cached SIDs, useful e.g. for sysvol problem solving via re-join
+	net cache flush
+
 	## set the default sysvol and GPO NTACLs
 	samba-tool ntacl sysvolreset
 
@@ -1010,6 +1013,9 @@
 
 		samba_domain_join "${samba_join_options[@]}"
 
+		## write UCS posix IDs into the idmap.ldb
+		/usr/lib/univention-directory-listener/system/samba4-idmap.py --direct-resync 2>/dev/null
+
 		sysvol_fixup --overwrite-local
 
 		## if the key version number increased, merge the old keys into the new keytab