Retention Policy problems

Hello,

i am trying to set up the automated archival of Exchange 2013.

So that e-mails, which are older than e.g. 1 year are get moved to the archive.

What i did:

1.  Create a archive database

2.  Create a archive mailbox

3.  Create a retention tag

4.  Create a retention policy

4.1 Including a Default tag and a personal tag

5. Linked it to a user: Set-mailbox “administrator” -RetentionPolicy "Movetoarchivpolicy"

6. Checked the User: Get-Mailbox “administrator” | Select RetentionPolicy

7. Started the ManagedFolderAssistant: Start-ManagedFolderAssistant -Identity “administrator”

8. But all Mails stayed in the Mailbox

9. I tryed to manually assign a retention tag to a Mail, but I dont have the button. (OWA and Outlook 2013 ProPlus).

Have anyone an idea, why i don't have the "assign policy" button?

And why all Mails stay in the Mailbox?

Thanks,