Tutorial: How to use ISPConfig and Seafile without manual file modifications
This post is from 2014. Versions, commands and links in it may be outdated. The current release is ISPConfig 3.3.2p1.
Seafile is an open-source cloud-based file storage system similar to Dropbox & Box. The difference is that Seafile can be deployed on a client's own system. This provides a greater safety and security factor as the passwords are only interchanged between the client who setup the system, and his / her own users rather than a corporate cloud hosting company.
http://www.howtoforge.com/how-to-use-ispconfig-and-seafile-without-manual-modifications