It appears that the "download all attachments" button from owa 2010 has been removed in 2013... Is this on purpose? Or will it be coming back in a patch? I have very frustrated users that are annoyed by the functionality in 2013 vs. 2010. Anyone in the know have any idea on this? Thanks!

Yep you are right.

Its not there anymore. This feature became available with Exchange 2010 SP1.

However, its removed from Exchange 2013. Maybe someone forgot it :) . Hopefully it will become available again with future updates.

Does anyone know if this will be added back to Exchange 2013 anytime soon? I heard O365 got it back sometime late last year but no luck with on-premise Exchange 2013 yet. I just updated to CU8 as well.