The main reason i use Exchange Server 2010 in our company and in all of our clients/customers companies is because they not want to use any cloud service. Also our clients/customers don't want to use any cloud service or mobile apps (UWP) on desktop computers.
Newer versions of Exchange Server remove the Exchange Management Console (EMC), the Exchange Control Panel and Microsoft is deprecating the SmartScreen Anti-Spam and other useful features in order to move to cloud services ONLY.
Deprecating SmartScreen and not launching more SmartScreen updates for Exchange is the worst decision that Microsoft has been able to make. I do not understand any of the latest decisions so unintelligent that Microsoft is taking that go against the users and only benefit Microsoft itself. It's only just a matter of money and how being able to cash in.
Because of this we have no options with Microsoft because the first two options are cloud services and the third options is a downgrade to a newer version of Exchange. I don't know why since 2010 every new versions in all Microsoft Products are downgrades except for SQL Server and some any other program/application. I think this is due to the new Microsoft "Mobile First, Cloud First and Desktop never again" policy.
I know that today Microsoft is only Mobile First, Cloud First and Desktop never again, but our company and all of our Clients/Customers companies, more than 100, don't want and will never use any cloud service and will never pay a subscription for software services, SaaS, cloud services, etc. They want their personal and private servers not connected to any service. Also don't want the slow, limited, less featured mobile apps (UWP) on desktop.
We even have clients who, in order to entrust us with certain jobs, force us to sign a contract in which we have to declare and demonstrate that they will be carried out on computers that are not connected to any cloud service.
All of our clients/customers are stick in Windows 7 with all Telemetry disabled, because in Windows 10 is also imposible to block all telemetry, imposible to control Windows Updates, imposible to delete all mobile UWP garbage apps and with a terrific and a nightmare ugly user interface without a decent Start Menu and with less, less, less features and options configurations than Windows 7, like Advanced Appearance Settings and more. With every update there are less options/features in Control Panel and "Settings" is a mobile UWP app garbage mess.
It's time to search and look for new desktop solutions that are not from Microsoft, because Microsoft is not an option today and is not an option to the future because is migrating all to the cloud, to services and to mobile. DESKTOP and PRIVATE SERVER never again.
Thanks Microsoft for all these years with such good products that you have had until recently but is time to say goodbye to Microsoft.
Bye, bye, Microsoft.