[IMP] db_management: add doc for unlink db

db_management/db_premise.rst

@@ -29,10 +29,135 @@ problems down the line.
     duplicated database; a manual operation is no longer required.
 
 The database uuid is currently accessible from the menu **Settings > Technical
-> System Parameters**, we advise you to use a 
+> System Parameters**, we advise you to use a
 `uuid generator <https://www.uuidgenerator.net>`__ or to use the unix command
 ``uuidgen`` to generate a new uuid. You can then simply replace it like any
 other record by clicking on it and using the edit button.
 
 .. image:: media/db_uuid.png
-    :align: center
+    :align: center
+
+
+
+Register your database
+======================
+
+
+To register your database, you just need to enter your Subscription Code in the
+banner in the Appswitcher.
+
+If you have this error message : **"Something went wrong while registering your
+database, you can try again or contact Odoo Help"**
+
+.. image:: media/error_message_sub_code.png
+    :align: center
+
+***Good to check***
+
+
+* Do you have a valid Enterprise subscription?
+    * You can check if your subscription details get the tag "in progress" on
+    your `Odoo Account
+    <https://accounts.odoo.com/my/contract>` or with your Account Manager
+* Have you already linked a database with your subscription reference?
+    * You can link only one database per subscription.
+    ( Need a test or a development database? `Find a partner
+    <https://www.odoo.com/partners>`)
+    * You can unlink the old database yourself on your `Odoo Contract
+    <https://accounts.odoo.com/my/contract>` with the button "Unlink database"
+
+..image:: media/unlink_single_db.png
+      :align: center
+
+Don't forget to confirm it
+
+..image:: media/unlink_confirm_enterprise_edition.png
+      :align: center
+
+* Do you have the updated version of Odoo 9?
+    * From July 2016 onward, Odoo 9 now automatically change the uuid of a
+    duplicated database; a manual operation is no longer required.
+    * If it's not the case, you may have multiple databases sharing the same
+    UUID. Please check on your `Odoo Contract
+    <https://accounts.odoo.com/my/contract>`.
+
+..image:: media/unlink_db_name_collision.png
+    :align: center
+
+In this case, you need to change the UUID on your test databases to solve this
+issue. So please, read the documentation to know `How to duplicate a database
+(on-premise) <https://www.odoo.com/documentation/user/9.0/db_management
+/documentation.html#duplicating-a-database-on-premise>`.
+
+For your information, we identify database with UUID.
+
+
+Expiration message due to extra users
+=====================================
+
+If you have this error message : **"This database will expire in X days, you
+have more users than your subscription allows"**
+
+..image:: media/add_more_users.jpg
+    :align: center
+
+When the message appears you have 30 days before the expiration.
+The countdown is updated everyday.
+
+***Solutions***
+
+* Add more users : accept the upsell quotation and pay for the extra users.
+
+or
+* **Deactivate** users as explained in this `Documentation
+<https://www.odoo.com
+/documentation/user/10.0/db_management/documentation.html#deactivating-users>`
+and **Reject** the upsell quotation.
+
+*Now your database has the correct number of users, the "expiration message"
+will disappear automatically after a few days, when the next verification will
+be done. We understand that it can be a bit frightening to see the countdown,
+so you can force a ping to accelerate the verification*
+
+***How to force a Ping***
+
+1. Connect to the database with the **Administrator** account
+2. Switch to the Developer mode by using the **About** option in the
+top-right menu (in V9) /  in **Settings**  (in V10): click on
+**Activate the developer mode**
+3. Navigate to the "Settings" menu, then "Technical" > "Automation" >
+"Scheduled Actions"
+4. Find "Update Notification" in the list, click on it, and finally click on the
+button "**RUN MANUALLY**"
+5. When you refresh the "Expiration" notification should be gone.
+
+
+* Please check if you have correctly duplicated your database.
+
+*You may have kept the same UUID on different databases and we receive
+information from those databases too. So please read the documentation to know
+`How to duplicate a database (on-premise)
+<https://www.odoo.com/documentation/user/9.0/db_management
+/documentation.html#duplicating-a-database-on-premise>` and change the UUID.
+After the change you can force a ping to accelerate the verification.
+Then your production database will be correctly identify.*
+
+Database expired
+================
+
+If you have this error message : **"This database has expired, you have more
+users than your subscription allows"**
+
+..image:: media/database_expired.jpg
+    :align: center
+
+You had 30 days to take action and now your database is expired.
+
+***Solutions***
+
+* Add more users : follow the link "Add more users" and pay for the extra users.
+* Contact our `Support <https://www.odoo.com/help>`
+
+
+None of those solutions worked for you? Please contact our
+`Support <https://www.odoo.com/help>`