Prerna,
When you have DeskI report using Universe1 and then you convert it to WebI, the report conversion tool converts the DeskI - WebI report using Universe1. The conversion tool converts you DeskI to WebI, there is NO Universe conversion.
If you want to convert a UNV to UNX then you need to use the IDT tool.
Need much more information on what exactly you are asking and explain your workflow.
Regards,
Ajay