Sync external OneDrive shared folders

Intermittent would be the best way to describe it at this point. Our experience is that between the same tenants we find it works fine for user A, then user B might have to view it in Classic to see the sync, then user C might need some sort of ID reset in the source tenant to get it to go, etc.. No consistency even between the same two tenants. So while rollout may have been an issue early on wherein some tenants had the feature and others did not, that should no longer be the case and even if it were, the example above is within a 2 tenant test group where the feature must already exist. Although I suppose there could be a single tenant difference between MS datacenters?

IDK, as yvesvg stated - it's 2021. The simpletons over at DropBox are still kicking the mighty Microsoft. People are losing their jobs trying to pull Microsoft dead weight - fix it or we will have to recommend Google Drive.