diff --git a/en_US/upgrade/0-upgrade.iredmail.1.4.0-1.4.1.md b/en_US/upgrade/0-upgrade.iredmail.1.4.0-1.4.1.md
index de8a299c..612a16c9 100644
--- a/en_US/upgrade/0-upgrade.iredmail.1.4.0-1.4.1.md
+++ b/en_US/upgrade/0-upgrade.iredmail.1.4.0-1.4.1.md
@@ -83,3 +83,101 @@ You're free to define more ban rules to fit your own needs.
USE amavisd;
UPDATE policy SET banned_rulenames="ALLOW_MS_WORD,ALLOW_MS_EXCEL" WHERE policy_name="user@domain.com";
+
+## For OpenLDAP backend
+
+### Add new attribute/value pairs for per-user SOGo webmail / calendar / activesync service control
+
+iRedMail-1.4.1 improves SOGo config file and it's able to enable or disable
+per-user SOGo webmail, calendar, activesync services with 3 new LDAP
+attribute/value pairs:
+
+- `enabledService=sogowebmail`
+- `enabledService=sogocalendar`
+- `enabledService=sogoactivesync`
+
+The old `enabledService=sogo` is still used to enable or disable whole SOGo
+access.
+
+* Download script used to update existing mail accounts:
+
+```
+cd /root/
+wget https://github.com/iredmail/iRedMail/raw/1.4.1/update/1.4.1/update-ldap.py
+```
+
+* Open downloaded file `update-ldap.py`, set LDAP server related settings in
+ this file:
+
+ You can find required LDAP credential in iRedAdmin config file
+ (`/opt/www/iredadmin/settings.py`), using either
+ `cn=Manager,dc=xx,dc=xx` or `cn=vmailadmin,dc=xx,dc=xx` as bind dn is ok.
+
+```
+# Part of file: updateLDAPValues_099_to_1.py
+
+uri = 'ldap://127.0.0.1:389'
+basedn = 'o=domains,dc=example,dc=com'
+bind_dn = 'cn=vmailadmin,dc=example,dc=com'
+bind_pw = 'passwd'
+```
+
+* Execute this script with Python-3 to update LDAP data:
+
+```
+# python3 update-ldap.py
+```
+
+## For MySQL and MariaDB backends
+
+### Add new SQL columns in `vmail.mailbox` table
+
+iRedMail-1.4.1 introduces 3 new columns used to enable or disable per-user
+SOGo webmail, calendar and activesync services:
+
+- `enablesogowebmail`
+- `enablesogocalendar`
+- `enablesogoactivesync`
+
+Download plain SQL file used to update SQL table, then import it as
+MySQL root user (Please run commands below as `root` user):
+
+```
+wget -O /tmp/iredmail.mysql https://github.com/iredmail/iRedMail/raw/1.4.1/update/1.4.1/iredmail.mysql
+mysql vmail < /tmp/iredmail.mysql
+rm -f /tmp/iredmail.mysql
+```
+
+## For PostgreSQL backend
+
+### Add new SQL columns in `vmail.mailbox` table
+
+iRedMail-1.4.1 introduces 3 new columns used to enable or disable per-user
+SOGo webmail, calendar and activesync services:
+
+- `enablesogowebmail`
+- `enablesogocalendar`
+- `enablesogoactivesync`
+
+Download plain SQL file used to update SQL table:
+
+```
+wget -O /tmp/iredmail.pgsql https://github.com/iredmail/iRedMail/raw/1.4.1/update/1.4.1/iredmail.pgsql
+chmod +r /tmp/iredmail.pgsql
+```
+
+* Connect to PostgreSQL server as `postgres` user and import the SQL file:
+ * on Linux, it's `postgres` user
+ * on FreeBSD, it's `pgsql` user
+ * on OpenBSD, it's `_postgresql` user
+
+```
+su - postgres
+psql -d vmail < /tmp/iredmail.pgsql
+```
+
+* Remove downloaded file:
+
+```
+rm -f /tmp/iredmail.pgsql
+```
diff --git a/html/upgrade.iredmail.1.4.0-1.4.1.html b/html/upgrade.iredmail.1.4.0-1.4.1.html
index f6477f95..8894b544 100644
--- a/html/upgrade.iredmail.1.4.0-1.4.1.html
+++ b/html/upgrade.iredmail.1.4.0-1.4.1.html
@@ -28,6 +28,18 @@
+For OpenLDAP backend
+
+For MySQL and MariaDB backends
+
+For PostgreSQL backend
+
@@ -106,6 +118,95 @@ commands below to achieve it (Note: we use MySQL for example):
USE amavisd;
UPDATE policy SET banned_rulenames="ALLOW_MS_WORD,ALLOW_MS_EXCEL" WHERE policy_name="user@domain.com";
-
+For OpenLDAP backend
+Add new attribute/value pairs for per-user SOGo webmail / calendar / activesync service control
+iRedMail-1.4.1 improves SOGo config file and it's able to enable or disable
+per-user SOGo webmail, calendar, activesync services with 3 new LDAP
+attribute/value pairs:
+
+enabledService=sogowebmailenabledService=sogocalendarenabledService=sogoactivesync
+The old enabledService=sogo is still used to enable or disable whole SOGo
+access.
+
+- Download script used to update existing mail accounts:
+
+cd /root/
+wget https://github.com/iredmail/iRedMail/raw/1.4.1/update/1.4.1/update-ldap.py
+
+
+
+-
+
Open downloaded file update-ldap.py, set LDAP server related settings in
+ this file:
+You can find required LDAP credential in iRedAdmin config file
+(/opt/www/iredadmin/settings.py), using either
+cn=Manager,dc=xx,dc=xx or cn=vmailadmin,dc=xx,dc=xx as bind dn is ok.
+
+
+# Part of file: updateLDAPValues_099_to_1.py
+
+uri = 'ldap://127.0.0.1:389'
+basedn = 'o=domains,dc=example,dc=com'
+bind_dn = 'cn=vmailadmin,dc=example,dc=com'
+bind_pw = 'passwd'
+
+
+
+- Execute this script with Python-3 to update LDAP data:
+
+# python3 update-ldap.py
+
+
+For MySQL and MariaDB backends
+Add new SQL columns in vmail.mailbox table
+iRedMail-1.4.1 introduces 3 new columns used to enable or disable per-user
+SOGo webmail, calendar and activesync services:
+
+enablesogowebmailenablesogocalendarenablesogoactivesync
+Download plain SQL file used to update SQL table, then import it as
+MySQL root user (Please run commands below as root user):
+wget -O /tmp/iredmail.mysql https://github.com/iredmail/iRedMail/raw/1.4.1/update/1.4.1/iredmail.mysql
+mysql vmail < /tmp/iredmail.mysql
+rm -f /tmp/iredmail.mysql
+
+
+For PostgreSQL backend
+Add new SQL columns in vmail.mailbox table
+iRedMail-1.4.1 introduces 3 new columns used to enable or disable per-user
+SOGo webmail, calendar and activesync services:
+
+enablesogowebmailenablesogocalendarenablesogoactivesync
+Download plain SQL file used to update SQL table:
+wget -O /tmp/iredmail.pgsql https://github.com/iredmail/iRedMail/raw/1.4.1/update/1.4.1/iredmail.pgsql
+chmod +r /tmp/iredmail.pgsql
+
+
+
+- Connect to PostgreSQL server as
postgres user and import the SQL file:
+- on Linux, it's
postgres user
+- on FreeBSD, it's
pgsql user
+- on OpenBSD, it's
_postgresql user
+
+
+
+su - postgres
+psql -d vmail < /tmp/iredmail.pgsql
+
+
+
+- Remove downloaded file:
+
+rm -f /tmp/iredmail.pgsql
+