diff --git a/src/zmb-ad-join/constants-service.conf b/src/zmb-ad-join/constants-service.conf
index 244db4c..a63fb39 100644
--- a/src/zmb-ad-join/constants-service.conf
+++ b/src/zmb-ad-join/constants-service.conf
@@ -19,6 +19,16 @@ LXC_UNPRIVILEGED="0"
 # enable nesting feature
 LXC_NESTING="1"
 
+# add optional features to samba ad dc
+
+# CURRENTLY SUPPORTED:
+# wsdd = add windows service discovery
+# splitdns = add nginx to redirect to website www.domain.tld in splitdns setup
+# bind9dlz = Set ZMB_DNS_BACKEND to BIND9_DLZ
+
+# Example:
+# OPTIONAL_FEATURES=(wsdd)
+# OPTIONAL_FEATURES=(wsdd splitdns)
 OPTIONAL_FEATURES=(wsdd splitdns)
 
 # service dependent meta tags
diff --git a/src/zmb-ad-join/install-service.sh b/src/zmb-ad-join/install-service.sh
index a75bbbe..67b0798 100644
--- a/src/zmb-ad-join/install-service.sh
+++ b/src/zmb-ad-join/install-service.sh
@@ -60,8 +60,7 @@ apt update
 DEBIAN_FRONTEND=noninteractive DEBIAN_PRIORITY=critical apt -y -qq dist-upgrade
 # install required packages
 DEBIAN_FRONTEND=noninteractive DEBIAN_PRIORITY=critical apt install -y -o DPkg::options::="--force-confdef" -o DPkg::options::="--force-confold" $LXC_TOOLSET $ADDITIONAL_PACKAGES ntpdate rpl net-tools dnsutils ntp
-DEBIAN_FRONTEND=noninteractive DEBIAN_PRIORITY=critical apt install -y -o DPkg::options::="--force-confdef" -o DPkg::options::="--force-confold" -t $(lsb_release -cs)-backports acl attr samba smbclient winbind libpam-winbind libnss-winbind krb5-user samba-dsdb-modules samba-vfs-modules lmdb-utils
-
+DEBIAN_FRONTEND=noninteractive DEBIAN_PRIORITY=critical apt install -y -o DPkg::options::="--force-confdef" -o DPkg::options::="--force-confold" -t $(lsb_release -cs)-backports acl attr samba smbclient winbind libpam-winbind libnss-winbind krb5-user samba-dsdb-modules samba-vfs-modules lmdb-utils rsync cifs-utils
 if [[ "$ADDITIONAL_PACKAGES" == *"nginx-full"* ]]; then
 	  cat << EOF > /etc/nginx/sites-available/default
 server {