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New-ApplicationAccessPolicy

Use the New-ApplicationAccessPolicy cmdlet to restrict or deny access to a specific set of mailboxes by an application that uses APIs (Outlook REST, Microsoft Graph, or Exchange Web Services (EWS)). Exchange PowerShell reference

From the Exchange PowerShell reference 6 parameters Its page in the reference

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Parameters

6 in the Exchange PowerShell reference
-AccessRightThe AccessRight parameter specifies the restriction type that you want to assign in the application access policy.
-AppIdThe Identity parameter specifies the GUID of the apps to include in the policy.
-PolicyScopeGroupIDThe PolicyScopeGroupID parameter specifies the recipient to define in the policy.
-Confirm, -cfThe Confirm switch specifies whether to show or hide the confirmation prompt.
-DescriptionThe Description parameter specifies a description for the policy.
-WhatIf, -wiThe WhatIf switch shows what the command does without making any changes.