We're working on enabling SNI on a large number of ecommerce websites, however I've read that Bingbot has real issues with SNI. There was a 'through-the-grapevine' response from Microsoft in April 2015 saying it was supposedly going to be fixed "within the next 6 months," but I can't find anything that corroborates that.
There was also an article on SEL in July 2015 that basically said that microsoft may have pushed a fix out, but that there were still lingering issues.
