How to free used space from disabled index? I've come across a need to free used space from a large number of disabled indexes.

Is it possible to make SQL Server release the used space from these indexes without a drop/create for each index?

And I'm limited to SQL-Server 2014 functionality :/
No. Script out the disabled and unused indexes then drop them.  Save the script of index create statements in your flavor of Source control just in case you need them.