In the Google Play Store search for Slack and Install it. (It is a free app)
Once the app is installed, open it and click the “Sign In” button
When prompted to log in with an existing account, choose “None of the above” then choose “I’ll sign in manually”
You will be prompted to enter your Workspace URL
Enter “nelbroteam” in the Workspace URL box and click the “Next” button
When asked if you have an account on Office 365, click the “Sign in with Office 365” button.
This will open a web browser and prompt you to enter your Email, phone, or Skype
Enter your domain username (Ex. [email protected]) and click the “Next” button.
Enter your domain password and click the “Next” button.
When prompted to “Stay signed in” check the “Don’t show…” box and click the “Yes” button.
You should then be taken back to the Slack app where you are signed in and ready to go.