Learn the workaround for versions of Outlook not compatible with TLS 1.0.
Most web hosts have disabled the obsolete security protocol, TLS 1.0, and Microsoft Outlook requires v. 1.0 to connect on some versions of Windows. A 1.1/1.2-compliant version of Outlook will not be available until October 2018 at the earliest.
To allow Outlook to connect TLS over 1.2 and retain PCI compliance, we recommend using IIS Crypto, a free tool from Nartac Software.
This PCI-compliant solution allows Outlook to connect over TLS 1.1 and 1.2, but involves making changes to your Windows registry.
If you are uncomfortable changing your registry, or prefer an alternative, we recommend IIS Crypto, a free tool from Nartac Software.
ATTENTION: This solution requires Windows Server 2008 R2 or Windows 7, or newer, and administrative access.
ATTENTION: This solution has not been tested on all configurations and your results may vary. For additional options, see the Other resources section.
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