For companies implementing Oracle Primavera P6 Enterprise Portfolio Project Management (EPPM) R8.3.2 or earlier, you will need to downgrade your user base to IE 10. P6 EPPM is not supported and doesn’t work with IE 11. Whatever your reasons for needing to downgrade, the following steps show you the process. http://ow.ly/EMV6l
I hope this helps.
Emily