bbPress forum

When it comes to creating forums, we cannot recommend enough bbPress. See

It is created by the WordPress team, free and highly extendable with a heap of free extensions. There is no specific changes to do with Woffice, it will work fine right out of the box. 

You just need to install it, activate it and create your forum pages. 

Also, note that there is an integration with BuddyPress that you can enable in the bbPress settings, Settings > Forums > Group Forums section, that will enable BuddyPress Groups to have their own forums.