General changes:
- Decreasing Exchange Rights in the Active Directory – Deny ACE placed on the DNS Admins group and the ability for Exchange to assign Service Principal Names (SPN’s) was removed because these are not required by Exchange; the directory updates released today are fully compatible with all versions of Exchange Server regardless of cumulative update or update rollup version deployed and so these changes can be applied to any existing Exchange deployment by following the steps above
- Support for .NET Framework 4.8 – support for .NET Framework 4.8 added. The minimum .NET requirement remains 4.7.2 on Exchange Servers. .NET 4.8 will be required with all updates released in December 2019 and later
- Authentication Policies Update – enhanced the feature to provide the ability to specify it as default authentication policy at Organization level
- Future support of Modern Authentication in on-premises Exchange – this capability in on-premises Exchange server will no longer be pursued; Modern Authentication will be restricted to customers with hybrid deployments
- Controlled Connections to Public Folders in Outlook – added support to Exchange Online to help admins have control over which users would see public folders in their Outlook clients