Add 'add organization' in Docker Admin (#17640)

* add 'add organization' in Docker Admin.

---------

Signed-off-by: Craig Osterhout <craig.osterhout@docker.com>
Co-authored-by: Stephanie Aurelio <133041642+stephaurelio@users.noreply.github.com>

admin/company/index.md

@@ -21,7 +21,7 @@ Learn how to administer a company using Docker Admin in the following sections.
                  <a href="/admin/company/organizations/"><img src="/assets/images/note-add.svg" alt="Manage organizations" width="70" height="70"></a>
             </div>
                 <h2 id="mangage-orgs"><a href="/admin/company/organizations/">Manage organizations</a></h2>
-                <p>Learn how to manage organizations and seats within your company.</p>
+                <p>Learn how to add and manage organizations as well as seats within your company.</p>
         </div>
      </div>
       <div class="col-xs-12 col-sm-12 col-md-12 col-lg-4 block">

admin/company/organizations.md

@@ -20,6 +20,17 @@ When you have a [self-serve](../../subscription/details.md#self-serve) subscript
 3. Under **Organizations**, select **Overview**.
 4. Select the action icon in the organization's card, and then select **Get more seats**.
 
+
+## Add organizations to a company
+
+There is no limit to the number of organizations you can have under a company layer. All organizations must have a Business subscription.
+
+1. Sign in to [Docker Admin](https://admin.docker.com){: target="_blank" rel="noopener" class="_"}.
+2. In the left navigation, select your company in the drop-down menu.
+3. Select **Add organization**.
+4. Choose the organization you want to add from the drop-down menu.
+5. Select **Add organization** to confirm.
+
 ## Manage an organization
 
 1. Sign in to [Docker Admin](https://admin.docker.com){: target="_blank" rel="noopener" class="_"}.