Set up the Microsoft Authenticator app as your verification method
On the Add a method page, select Authenticator app from the list, and then select Add. On the Start by getting the app page, select Download now to download and install the Microsoft Authenticator app on your mobile device, and then select Next.
Sign in to Viva Engage - Microsoft Support
With Viva Engage on your PC, Mac, or mobile device, you can: Connect and engage across your organization. Tap into the knowledge of others. Use your Inbox to view, prioritize, and manage the most important messages and announcements. Search for experts, conversations, and communities.