disables IPV6 from powershell for Server
New-ItemProperty -Path HKLM:\SYSTEM\CurrentControlSet\services\TCPIP6\Parameters -Name DisabledComponents -PropertyType DWord -Value 0xffffffff
Enable Adobe Flash you need to install the server feature Desktop Experience.
This can be found in Server Manager, Features, User Interfaces and Infrastructure.this option and then reboot
Exchange Server 2013 enables you to configure your mailbox databases in a database availability group (DAG) for automatic datacenter failover.
This configuration requires three separate physical locations: two datacenters for mailbox servers and a third location to place the witness server for the DAG.
Organizations with only two physical locations now can also take advantage of automatic datacenter failover by using a Microsoft Azure file server virtual machine to act as the DAG’s witness server.
Taken from the site of Thanks technet