As an organization that buys hundreds of vouchers, can I get a report of which ones were redeemed and whether candidates passed their exams?

You will have visibility into who has used a voucher, but not whether a candidate has passed or failed.

Individuals with an administrator role will be able to assign vouchers to employees and have visibility into which vouchers have been viewed (used) and redeemed at registration and when the exam is scheduled or took place.

The exam results will not be available in Xvoucher. 

You can find this report by logging into your Xvoucher account and going to Track → Candidate → Exam Vouchers and clicking ‘Get Report’