Mail folder created via iNotes does not replicate

Hello everyone,I have a problem with a mail folder that I created via iNotes (Full Mode). I created a new folder and pushed some mails from the inbox into it.

The iNotes ist hosted on a Domino Server that can be reached from the internet. That server replicates with two other Domino Servers in the LAN.

When I accessed my mailfile on one of the internal Domino Servers via the Lotus Notes Client some weeks later, I did not find that folder. It exists, however, on the server hosting iNotes.

I started a replication between those servers, but that should have happened anyway. The folder stays invisible. I can find the mails in it by selecting “All Documents”, but I would prefer to have the folder on all servers.

Any ideas?