When you try to open attachments that have been archived, you get "There was an error in Archive Manager". In the Application Event log on the IIS server, you see website errors generated saying that there was a problem with "GetFileFromCentera".
When you have a remote IIS server, you need to give it access to the PEA file that is set as the connection string in the configuration editor.
It cannot make a connection otherwise.
Copy the PEA file to the same location on the IIS server as it is on the Application server, or share the PEA file and set the location in the configuration editor to the share path. Make sure that the user running the Application Pool has rights to this file.