Enterprise IT environments are complex. Some information is well documented, while much is unknown. modelizeIT is an automated business application discovery and architecture mapping solution that collects the deep data center information needed to prepare for cloud migrations. modelizeIT auto-identifies groups of servers that logically work together and form business applications and generates architectural diagrams for each such grouping. modelizeIT collects deep information about middleware systems, deployed applications, databases, clusters, middleware cells, and auto-recognizes custom or rare applications. This information makes it possible to identify the applications even if no traces of their documentation or IT personnel knowledge is available.