Disabling TLS 1.0 may cause Outlook to crash for some of your clients.
I encountered this recently while upgrading a customer from Exchange 2010 to Exchange 2016. The customer had an existing Kemp Load Balancer they had been using for Exchange 2010. We upgraded the Kemp to the latest firmware and created a new Exchange 2016 VIP using the latest templates from Kemp. When we cut over our DNS to the new VIP some of our Outlook clients started to receive the errors below. Other Outlook clients continued to operate without incident.
For some Outlook clients, we would receive errors when creating a brand new profile in Outlook. Errors such as,“Windows Shell Common DLL has stopped working”
Clicking “Close Program” would then be followed by an error reporting that “System resources are critically low”.