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Laurie It should be clarified that Moz's Domain Authority, while a really solid metric, is not the metric Google has or uses. And domain authority can have a few artificial quirks. So I would not be alarmed at all. That said - can you explain where you are seeing the two different number? I see a Page Authority of 39 for both http and https - and I see a domain authority of 27 for both http and https. Now, even IF Moz has two different numbers for http and https, again, this is not what Google is doing, it's just an approximation. Setting a canonical from https to http is just a band-aid and I would not recommend that approach. I would recommend having a site-wide 301 redirect so if a user lands on the https version of a URL it redirects them to the same version of that page on http. Or vice vera, whichever version you are prioritizing. I have to respectfully disagree with Dmytro and Robert - as mentioned, Moz's metrics are not Google metrics - and the best action here is always to prioritize http or https with redirects.

Well that's new. I just checked a fetch I did in GWT a few days ago and that wasn't there. The canonical is wrong too. I'll have to get my developer to fix that. Thank you Laura for pointing that out.