Add doc for create ad account and set permissions.

en_US/cloud/0-cloud-create.ad.account.md

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+# Create AD account for iRedMail
+[TOC]
+
+## Summary
+With iRedMail (ad backend), we need two accounts, admin account with all privileges, low-privileged account with read-only privilege.
+In this tutorial, we will show you how to create account in AD, with strong and complex password.
+
+- low-privileged account `vmail`.
+- admin account `vmailadmin`.
+
+This tutorial has been tested on:
+
+- Windows Server 2012
+
+If it works for you on different Windows Server version, please let us know.
+
+## Create low-privileged account.
+
+- Click `Start` on bottom-left corner of your Windows OS, click `Server Manager`.
+
+![](./images/create.ad.account/start-server-manager.png)
+
+- Click `Tools` on top-right corner, click `Active Directory Domains and Trusts`.
+
+![](./images/create.ad.account/create_ad_account_1.png)
+
+-  Right click your AD domain, here is `iredmail.org`,  then click `Manage`.
+
+![](./images/create.ad.account/create_ad_account_2.png)
+
+-  At the new windows,  right click `Users` --> `New` --> `User`.
+
+![](./images/create.ad.account/create_ad_account_3.png)
+
+- Input `vmail` account info, click `Next`.
+
+![](./images/create.ad.account/read_only_account_1.png)
+
+- Input `vmail` account passowrd, and select `Password never expires`, click `Next`.
+
+![](./images/create.ad.account/read_only_account_2.png)
+
+
+- Click `Finish` to confirm.
+
+![](./images/create.ad.account/read_only_account_3.png)
+
+
+- Now account `vmail` has created, we will set read-only permission for `vmail`,  right click your AD domian here is `iredmail.org`, and select `Delegate Control...`.
+
+![](./images/create.ad.account/create_ad_account_4.png)
+
+
+- Click `Next`. 
+
+![](./images/create.ad.account/create_ad_account_5.png)
+
+
+- Click `Add`.
+
+![](./images/create.ad.account/create_ad_account_6.png)
+
+
+- Input read-only account `vmail`, and click `Ok`.
+
+![](./images/create.ad.account/read_only_account_4.png)
+
+
+- Click `Next`.
+
+![](./images/create.ad.account/read_only_account_5.png)
+
+- Select `"Read all user information"`, click `Next`.
+
+![](./images/create.ad.account/read_only_account_6.png)
+
+
+- Click `Finish` to confirm.
+
+![](./images/create.ad.account/read_only_account_7.png)
+
+- Low-privileged account `vmail` created.
+
+
+## Create admin account.
+
+- Click `Start` on bottom-left corner of your Windows OS, click `Server Manager`.
+
+![](./images/create.ad.account/start-server-manager.png)
+
+- Click `Tools` on top-right corner, click `Active Directory Domains and Trusts`.
+![](./images/create.ad.account/create_ad_account_1.png)
+
+-  Right click your AD domain, here is `iredmail.org`,  then click `Manage`.
+
+![](./images/create.ad.account/create_ad_account_2.png)
+
+-  At the new windows,  right click `Users` --> `New` --> `User`.
+
+![](./images/create.ad.account/create_ad_account_3.png)
+
+- Input `vmailadmin` account info, click `Next`.
+
+![](./images/create.ad.account/admin_account_1.png)
+
+- Input `vmailadmin` account passowrd, and select `Password never expires`, click `Next`.
+
+![](./images/create.ad.account/admin_account_2.png)
+
+
+- Click `Finish` to confirm.
+
+![](./images/create.ad.account/admin_account_3.png)
+
+
+- Now account `vmailadmin` has created, we will set read-only permission for `vmail`,  right click your AD domian here is `iredmail.org`, and select `Delegate Control...`.
+
+![](./images/create.ad.account/create_ad_account_4.png)
+
+
+- Click `Next`. 
+
+![](./images/create.ad.account/create_ad_account_5.png)
+
+
+- Click `Add`.
+
+![](./images/create.ad.account/create_ad_account_6.png)
+
+
+- Input admin account `vmailadmin`, and click `Ok`.
+
+![](./images/create.ad.account/admin_account_4.png)
+
+
+- Click `Next`.
+
+![](./images/create.ad.account/admin_account_5.png)
+
+- Select `"Create，delete, and manage user accounts"`, `"Reset user passowords and force password change at next logon"`, `"Read all user information"`, click `Next`.
+
+![](./images/create.ad.account/admin_account_6.png)
+
+
+- Click `Finish` to confirm.
+
+![](./images/create.ad.account/admin_account_7.png)
+
+- Low-privileged account `vmailadmin` created.