Windows 7 is no longer supported by Microsoft as of January 14, 2020 and will no longer receive security updates. We recommend that you upgrade to a modern operating system that receives regular security updates. If an upgrade beyond Windows 7 is not possible, we recommend that you use Mozilla Thunderbird as your email client.
Prerequisites: These instructions apply to Windows 7 SP1. To obtain Service Pack 1 for Windows 7, see the Microsoft website at the following link: http://windows.microsoft.com/windows7sp1
Symptoms
When configuring an e-mail account, on Outlook under Windows 7, by opting for a secure connection in IMAP, POP or SMTP, the error below may be displayed:
Cause
The Windows 7 operating system supports TLS 1.1 and TLS 1.2, but the latter are not enabled by default.
Resolution
You have to enable the TLS 1.1 and TLS 1.2 protocols. To do this, just create the following registry keys:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.1\Client] "DisabledByDefault"=dword:00000000
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.1\Server] "DisabledByDefault"=dword:00000000
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Client] "DisabledByDefault"=dword:00000000
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Server] "DisabledByDefault"=dword:00000000
You can also download the file TLS-Windows7.zip. Unzip it and and double-click on it to import it. Restart your computer and then try to configure your email account again.
TLS 1.1 and TLS 1.2 protocols are now enabled and your account configuration can be completed without errors.
