EWS is the only realistic way for "not Outlook" to work - MAPI is not exactly an open API. When EWS goes away so will rather a lot of customers, probably not e

EWS is the only realistic way for "not Outlook" to work - MAPI is not exactly an open API. When EWS goes away so will rather a lot of customers, probably not enough to dent the bottom line (initially). Then it becomes apparent that all email is equal and Exchange online becomes a footnote in history. Microsoft used to do email and then they shat the bed. All a bit embarrassing on the surface but not really. Running email systems is a right old pain when all you really desire is data (and metadata) to mine and flog on to other data fetishists. Email is generally rather static and rather large in storage terms but it can yield gold from personal exchanges. Ideally you get someone else to take the pain (AWS, Google and co - yes they get to mine but they bear the costs too) but ensure the marks use Outlook (and they do). Then you change Outlook (loving the new Electron version) to store all credentials in your cloud. You use those creds to mine data within email held on other people's clouds. They front the cost of storage. Smashing.