CmdID / PowerShell / Cmdlets / Enable
Enable-OrganizationCustomization
You might be prompted to run the EnableOrganizationCustomization cmdlet before you create or modify objects in your Exchange Online organization. Exchange PowerShell reference
From the Exchange PowerShell reference 2 parameters Its page in the reference
Parameters
-Confirm, -cfThe Confirm switch specifies whether to show or hide the confirmation prompt.-WhatIf, -wiThe WhatIf switch shows what the command does without making any changes.