Enabling Oracle for EFT Authentication is easy if you meet all prerequisites: http://help.globalscape.com/help/eft7-1/system_requirements_for_server.htm. However, installing ODAC can be tricky sometimes, even after installing the correct version described in the help file, some people get an error prompt “Connection Failed. Provider cannot be found. It may not be properly installed” when attempting to connect to EFT in the administration interface.
Make sure to use the 32 bit version of Oracle Data Access Components (ODAC ) regardless even if you are installing EFT on a 64 bits OS. (Refer to http://kb.globalscape.com/KnowledgebaseArticle10712.aspx.)
The attached PDF provides a detailed guide on the process of installing ODAC components for use with an Oracle database for EFT.