Set up your Microsoft 365 sign-in for multi-factor authentication

Go to https://aka.ms/MFASetup to begin 2FA Setup
Choose Next.
Select I want to set up a different method or Auth Phone. Microsoft 365 will ask for your mobile number, then send you an SMS message containing a 6-digit code to verify your device.Once you complete the instructions to specify your additional verification method, the next time you sign in to Microsoft 365, you'll be prompted to provide the additional verification information or action, such as typing the verification code provided by your authenticator app or sent to you by text message.
You will then be provided an app password. Store this password securely as you may need it to sign into devices that don't support 2FA login.
Any issues get in touch with I.T.
I.T. Evolved Support (itevolvedsupport.com)

Note: Generally you'll only need the additional verification method the first time you sign into a new app or device, or after you've changed your password. You probably won't be asked for the additional verification code on a daily basis, unless your organisation requires it.

If you don't wish to use your phone number you can follow the steps below.

Navigate to your phones App Store and search for Microsoft Authenticator app. The search results should have found the following app,
Download the app to your phone.
Once download is complete, a new icon will have appeared on your phone called Authenticator.

You will need this later in step 3.

Using your computer, open a browser and navigate to https://login.microsoftonline.com.
Log into Office 365 online with your company email address and password.
Your IT Administrator will already have enabled 2FA on your company user account, so you should receive the following prompt asking you to setup 2FA.

Click on Next.
You will then arrive on the page called Additional Security Verification asking you which security method you would like to use.
Select the option Mobile App from the drop down list and select Use verification code from the list of choices, click Set up.
Once this has been completed you will be displayed with the message below.

This contains the QR Code (black square) which you will need to scan with the Authenticator app downloaded in Step 1 to setup your account.

With your mobile phone in hand, open the Microsoft Authenticator app.
Skip any Intro screens the app may present to you until you get to the Ready to add your first account? screen or similar.
Select Add account or "+" icon in the top right corner of the app screen.
Select the option Work or school account.
You may be asked to allow the app to use your phone’s camera, click OK to allow this.
You will be presented with a screen called Scan QR code with a square camera box in the middle of the screen.
Lift the mobile device so that the QR code on your computer screen sits inside the Scan QR code camera square.
As soon as the Authenticator app has scanned the QR code the following screen will appear on the computer screen. Set up button is greyed out and the Next button is highlighted.

On the Authenticator app on your mobile phone a new account will have been created, displaying a set of 6 digits that updates every 30 seconds. This ever-changing number provides the second authentication factor required for 2FA.
Click Next on your computer screen.
You will then be prompted for the six-digit verification code from the Authenticator app.
Enter the six-digit code displayed on your mobile phone Authenticator app and click Verify.
Select the country from the drop down list and then enter your mobile telephone number. Click Next.

An Authenticator App password will be presented to you. please make a note of this and keep it safe. Write it down or use the copy tool to the right of the password then paste into notepad, so that you can save it to your machine.

Select Finished when you are sure you have a copy of the password stored.

OUTLOOK ON YOUR PC & MOBILE DEVICE WILL NEED THIS APP PASSWORD WHEN YOU NEXT USE IT

Open Outlook on your computer and when prompted enter your company email address (username) and click next.
Enter your Windows password (your computer logon password) then click Next.
You will then be prompted to enter the six-digit verification code from the Authenticator app on your phone. Enter the code and your Outlook will run as normal.