My Nokia Windows 8 phone and my ipad stopped sending my emails from hotmail yesterday at the same time. what is wrong?

Yesterday I was on my ipad or my phone through out the day.  I was able to send and receive emails all day long until about 8:00 last night, when I kept getting error messages.  I can send from my laptop, or when I physically log into my account, but both apps stopped working at the same time.  Is there an issue?