Google Message Archiving Quick Start - Manual (Page 13)

Getting Started 13
6. Under Settings, click User Access.
7. Under Message Center Access, select Enabled.
You need access to the Message Center to view your Personal Archive.
8. Select the Personal Archive privilege.
With this privilege, you are automatically granted the Archive Search and
Archive Recover privileges, which let you search and recover messages from
your Personal Archive.
For a full discussion of message security privileges, see:
The Email Security Service Authorization Reference
9. Click Save.