Modern Authentication for office on older OS (Windows 2008R2 or 7)

Hi

Today I seen some report, and I tested with some older OS, and the modern authentication now seem broke.

I wanted to discuss it, as not much site talk about the issue.

In my test any Office supported for O365 is impacted, so it really target the underlying OS.

The issue is an blank Windows appear, and it never load the content to authenticate.

I join an printscreen of the error;

Some older post from last year talk about ADAL registry key, but touching it just remove the blank windows, so it’s of no use.

In my case I migrated those system to a newer OS and now it work good, but I just wanted to share the bug if you fall into it.

Thanks

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