Known issues

Active errors/bugs:

  • Onlyoffice does not save files in the old format
    Onlyoffice has discontinued support for the old file formats (.xls, .doc, .ppt, . . . ). Documents with old formats should be converted to the new format (.xlsx, .docx, .pptx, . . . ) before editing with Onlyoffice.
  • Error message after installing/updating the FAUbox Client while using macOS Catalina
    Apple users using the macOS Catalina operating system will currently receive the following error message after installing/updating the FAUbox client:
    You can simply bypass the message by right-hand-clicking on the file and choosing “open”.
  • Links can no longer be used for upload 
    The permission to “read/write” is limited to the possibility to edit linked documents together. A link that allows both uploads and downloads is an “open relay” which is very likely to be misused by criminals as a fleamarket for criminal content. Please use the Upload Forms for linked uploads.
  • Links to Office and Text documents are currently not displayed as links but are opened as documents directly in Onlyoffice
    If you don’t want this to occur, you have to link them in a zipped format. A “.zip” file is displayed normally as a link and you can download the file.
  • SSO-Users can not use their Quota the first time they log in to the FAUbox
    In this case, please log out and log in again. You should be able to use your Quota once you have logged in for the second time.
  • Activating the guest account does not work 
    The problem most likely lies in choosing a password that does not meet the guidelines. Please ensure that your password adheres to the following criteria:
    • no spaces
    • at least one lowercase letter
    • at least one uppercase letter
    • at least one digit
    • at least one special character
    • at least 8 characters long
  • The „PowerFolder Outlook Add-In“ does not work for SSO users at the moment. The error will be fixed with one of the next versions. Workaround: SSO users can send files to external person by either creating and sending links or by inviting the external person to the FAUbox.
  • Some users encounter an “unknown error” in OnlyOffice while trying to open .docx-files in the cloud. This is a browser error and was only associated with Mozilla Firefox until now. You can fix the problem by deleting the browser cache and restarting Firefox.
  • The client rejects the authentication token. If the server rejects the authentication token and the client does not realize this, it will not be able to connect successfully. If this ocuurs, follow these steps:
    1. Close the client.
    2. Delete the following data
      For Windows: %appdata%\FAUbox\PowerFolder.config
      For Linux/Mac: ~/.FAUbox/PowerFolder.config
    3. Restart the client and log in.

Please note that the authentication token has an expiration date and must be renewed afterwards.


  • Android client crashes on login (Android 13)
    Currently, the installation is not possible for users with Android 13. It is expected that the next version will resolve this issue and allow installation again.
  • Add members to a group (fixed)
    FAUbox users can be added to a group by their FAUbox user ID. Due to a software error, it is currently not possible to invite people to the group via e-mail.


In case your problem and its solution were not listed above, you may find them in the FAQs.

If the issue persists or you notice something not functioning as expected, please contact us via Do not try to resolve this yourself as we have more options and methods to adress problems.