Managing Office 365 Add-ins Centralized Deployment

Hi everyone,

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I was wondering about Office 365 Add-ins Centralized Deployment. In the deployment window i can make add-in available for users to be installed from the admin managed store but only if add-in is for Outlook app. If i want to deploy add-in to Excel/PowerPoint/Word i need to deploy it directly for user security group. The option to make it available in managed add-ins store is not visible.

Is it by design or some settings in my tenant are not right?