diff --git a/services/univention-samba4/samba4-idmap.py b/services/univention-samba4/samba4-idmap.py
index e9c07dee46..a6685e2685 100755
--- a/services/univention-samba4/samba4-idmap.py
+++ b/services/univention-samba4/samba4-idmap.py
@@ -87,6 +87,24 @@ __SPECIAL_ACCOUNT_SIDS = {
 	"System": "S-1-5-18",
 	"Local Service": "S-1-5-19",
 	"Network Service": "S-1-5-20",
+	"Guests": "S-1-5-32-546",
+	"Account Operators": "S-1-5-32-548",
+	"Server Operators": "S-1-5-32-549",
+	"Backup Operators": "S-1-5-32-551",
+	"Replicators": "S-1-5-32-552",
+	"Pre-Windows 2000 Compatible Access": "S-1-5-32-554",
+	"Remote Desktop Users": "S-1-5-32-555",
+	"Network Configuration Operators": "S-1-5-32-556",
+	"Incoming Forest Trust Builders": "S-1-5-32-557",
+	"Performance Monitor Users": "S-1-5-32-558",
+	"Performance Log Users": "S-1-5-32-559",
+	"Windows Authorization Access Group": "S-1-5-32-560",
+	"Terminal Server License Servers": "S-1-5-32-561",
+	"Distributed COM Users": "S-1-5-32-562",
+	"IIS_IUSRS": "S-1-5-32-568",
+	"Cryptographic Operators": "S-1-5-32-569",
+	"Event Log Readers": "S-1-5-32-573",
+	"Certificate Service DCOM Access": "S-1-5-32-574",
 	"NTLM Authentication": "S-1-5-64-10",
 	"SChannel Authentication": "S-1-5-64-14",
 	"Digest Authentication": "S-1-5-64-21",