Setting up Tenant Configuration

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1.Go to Microsoft entraID and click on app registration and click on your app

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2.Click on API permission and click on add permission

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3.Click on Microsoft graph

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4.Click on delegated permissions , Search the required permission in the search box and select those permissions from the below list. required permissions are: Chat.ReadWrite\

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5.Click on Add permissions after selecting all the permissions

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6.Click on Grant admin consent for <Your app>