If you've pointed DMARC to Valimail successfully but are still not seeing any information in the Authentication Report, it's possible that you are sending to domains whose receiving gateways (SEGs) are not sending out DMARC aggregate reports.
While DMARC is supported widely around the world, there is a small number of email receiving systems that do not send out aggregate reports. We recommend that you start emailing a wider array of recipients across a larger number of receiving servers- eg Google, Yahoo, etc. at a higher volume to test the reporting features.
Customers who strictly use O365 as their gateway and mostly email other domains of theirs may be interested in using our paid platform (Enforce) and enabling our Helios product, which can generate DMARC aggregate reports for your O365 instance.