Retention Compliance Rule - Exclude Item Classes
Provide the capability to exclude item classes from a Retention Compliance Rule. This will allow for excluding Notes, Tasks, and Calendar items
MS has published articles detailing how to do this for hold policies dating back to January of 2018, but the cmdlets still do not exist.
Set-RetentionComplianceRule [-ExcludedItemClasses <MultiValuedProperty>
Use an auto-apply label policy and exclude ItemClass.
Ken Haass commented
We cannot migrate to online Exchange until this is fixed.
Paul Richardson commented
We need this immediately. There's no reason why we should have to explain to users that this is a "normal part" of using Outlook/O365. Please look into this, Microsoft.