Error:
The data source is not properly configured for Office 365 authentication.
You are using TLS version 1.0, 1.1 and/or 3DES cipher which are depreciated to improve the security posture of Azure AD.
Solution:
After some back and forth we found the addition of the following reg keys resolved this. Run the following in an elevated PowerShell on the client computer.
Set-ItemProperty -Path 'HKLM:\SOFTWARE\Wow6432Node\Microsoft\.NETFramework\v4.0.30319' -Name 'SchUseStrongCrypto' -Value '1' -Type DWord
Set-ItemProperty -Path 'HKLM:\SOFTWARE\Microsoft\.NETFramework\v4.0.30319' -Name 'SchUseStrongCrypto' -Value '1' -Type Dword
