Could not connect to SharePoint Online: Legacy Auth blocked by ADFS Claim rule

[buidav]

🐛 Summary

Public Issue #1407 reported that they could not authenticate to SharePoint Online via Interactive Auth and shared this error message

Could not connect to SharePoint Online

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Microsoft documentation says this can be caused by a ADFS claim rule blocking legacy auth

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Fix is to use Modern Auth by default. Adding these additional parameters to the Connect-SPOService call in Connection.psm1

Connect-SPOService -Url https://REPLACEWITHYOURTENANTNAME-admin.sharepoint.com -ModernAuth $true -AuthenticationUrl https://login.microsoftonline.com/organizations

Don't think we need to continue supporting the legacy auth for SPO.
So, no need for any conditionals or retry mechanism for Legacy auth in case Modern Auth fails.

To reproduce

Requires ADFS claim rule blocking legacy auth to recreate this error.

Expected behavior

Successful SharePoint Authentication