Windows 7 and Exchange 2016 Disconnected

If you’re getting an Outlook Disconnected message on your Outlook recently, it may be due to the fact that your Windows 7 does not have the TLS 1.1 and TLS 1.2 support on the operating system. This is an easy fix for the Windows 7 and Exchange disconnected error.

Users of Windows 10 will not be affected from this.

Simply download the easy fix software from Microsoft’s website:

KB 3140245

A brief explanation of what the fix does is shown below:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\WinHttp

On x64-based computers, DefaultSecureProtocols must also be added to the Wow6432Node path:HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Internet Settings\WinHttp

The registry value is a DWORD bitmap. The value to use is determined by adding the values corresponding to the protocols desired.

DefaultSecureProtocols ValueProtocol enabled
0x00000008Enable SSL 2.0 by default
0x00000020Enable SSL 3.0 by default
0x00000080Enable TLS 1.0 by default
0x00000200Enable TLS 1.1 by default
0x00000800Enable TLS 1.2 by default

After the fix has been applied, you will now need to reboot. After the reboot the Outlook will renegotiate and connect again to the server. This is a security flaw based in Windows 7 and not related to our hosting services.