Hi Everyone,
I was exploring on preview feature on how can we connect SQL to Dynamics Data and while connecting to CDS received below error.
“Login failed: TDS protocol endpoint is disabled for this organization.”

Follow below steps to solve it.
1) Download the OrgDBOrgSettingsTool i.e. CRM2016-Tools-KB4046795-ENU-amd64 from here and run it.

2) Change CRM URL’s and Connections in the Configuration File.

Line 17 – Discovery Service URL
Line 21 – Version like Online or OnPrem.
Line 25 – Username
Line 31 – CRM Service URL
Add below runtime tag after ApplicationSettings.
<runtime>
<AppContextSwitchOverrides value="Switch.System.Net.DontEnableSchUseStrongCrypto=false"></AppContextSwitchOverrides>
</runtime

3) Run the below command by replacing OrgName.
Microsoft.Crm.SE.OrgDBOrgSettingsTool Update /u <OrgaName> EnableTDSEndpoint true

Hope this helps.
—
Happy 365’ing
Gopinath