Please consider that we haven’t tried the following instructions for Outlook 2003/2007/2013, if you are using this version released around 10 years ago you should consider upgrading to a newer version.

Follow the instructions below:

a) Update Windows 7/8 using Windows Update and download/install all important updates. For windows 7 is important that you install Service Pack 1.

b) Install KB3140245 and reboot:

c) Execute the EasyFix and reboot:

d) Start > Search for Execute, Type Regedit and press Enter to access Windows Registry.

Check this registry key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\Schannel\Protocols

Under the Protocols key, add two new keys, if not already there: One called “TLS 1.1” and one called “TLS 1.2“. Inside both of these keys, add another key called “Client“. Now create a DWORD value in each Client key called “DisabledByDefault” whose value is 00000000.

Reboot and start Outlook.

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