Regarding Database Configuration

Hello Team,

I am working for XMPP chat through Open Fire Server. Developing iOS application which backend server in .net based. For this i have my own database of server side backend And when I setup openfire server then its required setup database. So my question is how can be customization of database and can we use our own database for the open fire and server backend.

Please help me figure out these setup so i can proceed in easier way.

Thans in advance