As of 7.13.3, bpm’online will stop supporting IIS 7 and 7.5 (Windows Server 2008 and Windows Server 2008 R2). Starting with 7.13.3, bpm’online will support IIS version 8 and up (Windows Server 2012 and up).

Bpm'online on-site users will need to upgrade their application servers to Windows Server 2012 and up in order to update bpm'online from 7.13.2 to 7.13.3.