The Domino provisioning and mailbox archiving tasks need to access the user's mail databases to do the following:
To comply with the Domino security model, this access to Domino mail databases needs to be done by an authenticated user using a Lotus Notes ID file. When you configure the server document for target Domino mail servers, you will give this ID at least Editor access and Delete Documents and Create shared folders/views permissions on mail files to be archived.
See Granting the Domino archiving user access to all mail files.
Later, you specify this ID in the Enterprise Vault Administration Console when you are configuring Domino mailbox archiving. The ID details (including the password) are encrypted and stored in the Enterprise Vault directory database.
Although you can use any user ID file that has the correct level of access, we recommend that you create a generic user account and grant the user the access permissions required.