No problem second time around.

Installed last night (Surface Pro 3) and had to do a complete reinstall. No recovery was possible. I'm back at 1511 now and hoping update to 14271 won't trash my system again.

I am unable to get my outlook hosted email to sync completely with the Windows 10 mail app on my Surface Pro 3. This started when the 10240 preview was installed. I downgraded to 10166 with no change...