When you create mail journaling you can encrypt all documents using the Administrator ID. Last week a customer ask to add access for another user (developer). The Admin remove the database encryption but lots off documents remain encrypted . The solution was to remove the document encryption using the following steps:

When using the Domino Administrator client, the Rules tab does not display when you select Messaging Settings on the Configuration tab. You may also notice that after a Configuration document is edited from the Domino Administrator client, the Rules tab no longer appears when the document is viewed from the Notes client.