i haven't checked but i see that question here more and more, must be something on their end. somebody asked the same question a week or so ago and after seeing multiple people complaining i checked and did not see a problem. i decided to do a instantsend test and sent one dash to the same address i always use but it never showed up. i contacted support and they said something in another language (as always) and that something happened and they had to upgrade and all old address had been lost.
they said they announced it on social media and as a news bulletin on their website but did not bother to send me a email (total FAIL). since i was not notified i asked them to do the right thing and send my dash back but they have so far ignored the request a week later and are just saying it's gone, sorry.

also, i never was able to get their google 2fa to work even after getting a new phone. i have never had that problem anywhere else and the foreign language support person did not help although they were quick to reply, back then. i'm not even sure (failed test) if they are still supporting instantsend after their upgrade fix because it said the transaction will appear after 1 network confirmation?
 with the language barrier and poor support for 2fa and other problems i will not be using them anymore. i'll probably use btc-e where my original btc deposit address from many many years ago still works as does my years old btc add from localbtc and coinbase and probably every other exchange i have used.

maybe someone else can verify if exmo's instantsend is working or not.