When you add an Office 365 Mail card to a Flow for the first time, you'll be prompted to configure the connection. This will enable you to connect your Office 365 Mail account, save your account information, and reuse the connection for future Office 365 Mail flows.
You can create multiple connections and manage them from your Connections page.
To create a new connection from an Event or Action card:
Click New Connection.
Enter a Connection Nickname. This is useful if you plan to create multiple Office 365 Mail connections to share with your team.
Log in to your Office 365 Mail account to authorize the connection.