CmdID / PowerShell / Cmdlets / Remove
Remove-AuthenticationPolicy
Use the Remove-AuthenticationPolicy cmdlet to remove authentication policies from your organization. Exchange PowerShell reference
From the Exchange PowerShell reference 5 parameters Its page in the reference
Parameters
-IdentityThe Identity parameter specifies the authentication policy you want to remove.-AllowLegacyExchangeTokensThe AllowLegacyExchangeTokens switch enables legacy Exchange tokens to be issued to Outlook add-ins for your organization.-Confirm, -cfThe Confirm switch specifies whether to show or hide the confirmation prompt.-TenantId-WhatIf, -wiThe WhatIf switch shows what the command does without making any changes.