Considering the importance of HTTPS to, in Google's words, "[making the] Internet safer more broadly", this seems like a good time to again suggest that Google enable HTTPS for Google Analytics by default[1]. Google Analytics is on 50.8% of the top million domains on the Internet, and on 26.96% of a randomly selected 48.5 million domains[1]. Of the 42 billion links analyzed in my research, over 48% of them had Google…
Sorry to jump in with a tangential reply, but BEWARE of the following! Google treat the http and https versions of a domain as SEPARATE PROPERTIES. This means that even if you 301 every http page to https when you transition, all of your current rankings and pagerank will be irrelevant. You can verify this behaviour for yourself in webmaster tools. I suppose this is because it's possible to serve up different content…
That's not quite accurate. It's on a per-URL basis, not properties. Webmaster Tools asks you to verify the different _sites_ (HTTP/HTTPS, www/non-www) separately because they can be very different. And yes I've personally seen a few cases - one somewhat strange example bluntly chides their users when they visit the HTTP site and tells them to visit the site again as HTTPS.
> This means that even if you 301 every http page to https when you transition, all of your current rankings and pagerank will be irrelevant.
That's not true. If you correctly redirect and do other details correctly (no mixed content, no inconsistent rel=canonical links, and everything else mentioned in the I/O video I referenced), then our algos will consolidate the indexing properties onto the HTTPS URLs. This is just another example of correctly setting up canonicalization.
By the way, if you're moving to HTTPS, following our site moves guidelines:
https://support.google.com/webmasters/topic/6033102?hl=en&re...
specifically, the site moves with URL changes:
https://support.google.com/webmasters/answer/6033049?hl=en&r...
But you did say you have a client with an issue. I suspect they either implemented the move to HTTPS incorrectly or something else is going on. Please ask for more help at our forums:
https://productforums.google.com/forum/#!categories/webmaste...