O365 Login from Android Phone
You will at first see the normal login screen as seen below where you will enter in your account name and hit next.
This will redirect you to Okta's website.
You will then use your same login information to proceed through the Okta Login process by entering your login and password. (Username: Example@domain.com / Password: typically your domain password)
Please note your security image will be the one you selected originally and not the one below.
Once successfully logged in you will be prompted to accept the following permission listed in the picture below. Once accepted you will be ready to use your email.