If you're using Exchange and you are absolutely sure you are typing your password in correctly - then the error might be with your username.
The first field Spiro is asking for (the username) is often just your email address - but sometimes it isn't - this all depends on how your IT administrator set up Outlook.
If you are confused on what your Exchange username is, try the portion of your email before the @ sign. If you use a domain, it's possible that you need to include your domain/username in the field.
If you're still having issues - reach out to someone on your IT help desk to help you resolve your username issues. They should be able to point you in the right direction.
You should probably just reset your username or password, since you definitely don't know it :) Spiro is using Google and Office 365's SDK's to authenticate, so the process is exactly the same as if you were logging into Gmail or Outlook.com on the web.