Where can one check the status of the Drive and Office servers?

Right now, I cannot create new documents or load existing ones, getting "Your file is very large", and/or ERROR_OFFLINE_WHILE_LOADING. So, I wanted to check the server status. However, status.mailbox.org does not include anything related to that? It only shows Support, Webmailer, Email server and Other Components. Also, it claims "All systems work" which clearly is not the case.

So: where can one check the server status of the Drive and Office/Open XChange components?

Aside, I've seen a related issue in 5KB spreadsheets won't open. "Your file is very large" and just spins which may be the solution to the problems I see. But the question remains.