Restore Archived Project

Dears ,

We are using SDL Trados 2015 + Groupshare .. When we have an archived project and wants to reopen it ,  Itys mentioned in the documentation :

Archiving a Completed Project

To archive a project:

  1. Select the projects you wish to archive. The projects you select must be in status Completed.

  2. Click the Archive Project button.

The project's status is changed from Completed to Archived.

 

Restoring an Archived Project

To restore a project:

  1. Use the available filtering options to search for projects in the Archived status.

  2. Select the projects you wish to restore.

  3. Click the Restore Project button.

The project's status is changed from Archived to Completed.

 

However these 2 utoons are not showing ( Archive Project , Restore Project ) .. I trie to go to the Ribbon Customization to add it , but it also not there .. please advise 

Thank you