Another example where old technology meets new technology. Old is in this case the Content Filtering agent on an Edge Transport server, new being Windows Server 2016. In short, the SmartScreen technology that is used in the Content Filtering agent conflicts with SmartScreen implementation in Windows Server 2016 operating system.
At this point this is known to prevent a proper uninstall of Exchange and can cause crashing transport services, this applies to an Exchange 2016 Mailbox server where the admin installed the anti-spam agents too.
From today Microsoft no longer recommends to install the Exchange 2016 Edge Transport role on Windows Server 2016, the same goes for installing the anti-spam agents on the Mailbox role when installed on Windows Server 2016.
What do you need to know about Exchange 2016 on Windows Server 2016:
- Requires Exchange 2016 CU3 or newer
- IIS bug causing issues with DAG members, fixed with KB3206632 and now a prereq for CU4
- Edge Transport role not recommended
- Anti-spam agents on Mailbox role not recommended
An interesting note is that the author of the post on the Exchange Team Blog consistently uses the term ‘Edge role’ instead of Edge Transport. This could be one more change in the branding but more likely just a mistake.