Forum Moderators: Robert Charlton & goodroi
Quoted from:
https://productforums.google.com/forum/#!topic/webmasters/9uXVsQ18WQk
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(Google Employee says)
Submit both old and new sitemaps on the HTTPS profile in your Google Search Console.
Quoted from [plus.google.com...]
(Google Employee says)
Use 301 redirects from HTTP to HTTPS, confirm the new version by adding a rel=canonical on the HTTPS page, pointing to itself, and submit sitemaps including both HTTP & HTTPS URLs with new change-dates (in the long run, just keep the HTTPS sitemap).
Quoted from [webmasterworld.com...]
msg#4852808
@DChan - I can see the confusion when someone at a Google discussion says...
submit sitemaps including both HTTP & HTTPS URLs with new change-dates (in the long run, just keep the HTTPS sitemap)
IMO this is not only bad advice, but serves no purpose. The 301 will take everyone, including Googlebot, to the HTTPS sitemap.xml. Having 2 conflicting records is not a good thing. Just let Googlebot crawl the new links and be done with it.
[edited by: Robert_Charlton at 10:46 am (utc) on Nov 10, 2017]
[edit reason] Google product forum link [/edit]
...resubmit to refresh the submission date, prompting a re-crawl and efficient discovery of the 301sYes, that's what I'm saying. Create a new HTTPS property and submit the new HTTPS sitemap. That's the only version of your site that will be used going forward.