To unarchive a database, you need to use the REST API (e.g. with Swagger), as it is it not possible to do this through the web interface alone. The REST API also supports archiving a database.

REST API with Swagger

To learn how to start using REST API with Swagger, read Exploring the REST API.

You need to find the PATCH “/api/version/instances/{InstanceId}/databases/{DatabaseName}” endpoint in the Database, tables and columns section. Click the “Try it out” button:

Then enter the DatabaseName, InstanceID, and set the isDeregistered field to:

•  true to archive, or
• false to unarchive.

Then press the “Execute” button.