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My guess? There will be some slight disruption while the recalculation takes place on the redirect from http to https. I'm not too certain that was the best move on your behalf though. There is a bit more involved in serving a site under https vs http, from a server processing perspective.
I don't think "I" would have been real pleased with that decision and I'd probably be handing out some PINK SLIPS right now. ;)
...for security reasons...
Why would they change your whole site to https? See tedster's comments in this current thread about how things should have been set up, to allow both http and https on the same site...
http and https: duplicate content?