Add bot: the generic way
Step 1: Open the App tab
In MS Teams left panel, click the Apps tab
Step 2: Search for Notifier
In the popup, search for Notifier and select it.
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Do not click open button, click the app card
Step 3: Choose where to add the bot
Click the down arrow and choose to Add to a team or Add to a chat.
Step 4: Add to the desired conversation
Select the group chat and click Set up a bot
Select the team and click Set up a bot