Yes and no! There would be no impact on SmarterTools and it actually might help us. This is a Microsoft problem and as more of our customers find out about it, the more we see customers dropping Microsoft clients in their organizations.
Microsoft is changing all their mail clients to communicate via Graph which means the client will only connect to Microsoft servers and software...which they acquired from a company called Acompli. These Microsoft servers will use EAS, EWS or IMAP to pull all your data onto their servers from your on-premise SmarterMail, Exchange, Mail Service or even Office365. Then, your message is sent to your client via Graph.
Overall, the experience for the user is similar other than its slower and since available has been very problematic.
Why is Microsoft doing this? It gives Microsoft an opportunity to store, analyze and monetize your email like Google does with Gmail. Email is incredibly valuable and easy to monetize and why the big companies want your email and will lose money on the service itself.
You can test it out yourself using Microsoft Outlook Mobile or you can use Microsoft Outlook for MacOS and enable "new mode" in the upper right. Microsoft is only supporting IMAP at the moment and there are a variety of other limitations and issues.
Be aware, we are noticing Microsoft is not removing customers data and accounts from their servers. We have had to communicate with people at Microsoft to help customers go back to old Outlooks etc.
There is so much emphasis on security and privacy these day and different appraoches (Apple vs Google) and for Microsoft to take a Google approach, should make us all pause.