These are all show stoppers. Offline support – what Microsoft is calling “offline” use of new Outlook isn’t great in practice. I speak from experience on some

These are all show stoppers. Offline support – what Microsoft is calling “offline” use of new Outlook isn’t great in practice. I speak from experience on some recent long-haul flights where I was grateful to have classic Outlook as a workable replacement. PST support – at the moment Outlook (new) can only read emails in PST files from classic Outlook. No write access or reading of contact or calendar data. Secure email – Microsoft is now promising S-Mime encryption for later this year. Cross-mailbox – it’s still not possible to move items between mailboxes. Mail merge – only classic Outlook works with Word’s Mail Merge to emails. How they think they can get away with this I have no idea.