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Hi Simon, It's not looking great. I don't have any inside information from Bing / Microsoft, but there seem to be SNI pages that are still not being indexed correctly. See, for example, this page: https://www.mnot.net/blog/2014/05/09/if_you_can_read_this_youre_sniing which is nowhere to be found in Bing's index. A site: search on bing finds two posts from the mnot site (out of hundreds). So it appears likely to still be flaky but I haven't gone down the rabbit hole of looking for other reasons that site may not be indexed, nor checked that it actually is using SNI. I also don't have an SNI site to test things on, so that's the best I have for you, I'm afraid. The only other link I found that may be interesting is this page claiming that SNI is supported by bing: https://www.ssllabs.com/ssltest/viewClient.html?name=BingPreview&version=Jan%202015 Sorry that's not more useful. You could reach out to the author of that SEL post (Ben Goodsell) and see if he's seen any changes since he wrote it.