Look into Hiri? See it mentioned in Linux forums and folks consistently praise their mail client (has Windows and macOS versions).
Unlike most non-Outlook clients, they ONLY support Exchange/o365.
Howzit
I tried as well with no luck. I then installed Hiri https://www.hiri.com/ and it works like a bomb. Closed sourced and you have to purchase after 15 days but it works perfectly. It helped me fully migrate from Windows 10 Pro and Outlook.
My workplace is deep into MS Exchange, and the only client on Linux I was able to quickly and easily via GUI get to work with that was Hiri, which has been brilliant. I know it's not FOSS and is proprietary, but there are fewer software packages I've happily paid for than Hiri.
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Insync is currently in the process of developing a OneDrive client that "just werks", similar to their Google Cloud sync which I've heard nothing but praise about; it's still not finished and this seems very recent.
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these are both paid, closed source solutions (which are both thankfully one time payments). Otherwise you can try your luck with Evolution (which imo is my perferred mail client, but I use imap) and one of the FOSS OneDrive clients.
I'm afraid you're not going to find a OneDrive client that is as good as an official one on Linux but I'd highly recommend Dropbox. It's available universally on all OSes. As for email client, maybe check out Hiri. https://www.hiri.com/
> you're going to have a hard time convincing the average person who uses their computer as a gateway to facebook and google to say move
What bothers me about this flavor of argument that it simultaneously claims that users want strongly to remain with the familiar, but also claims they don't do anything except use a browser. Chrome and Firefox browsers are the same, regardless of platform.
> Linux is wayyyyy to fragmented for the average person who doesn't know what a driver is, cares about RHEL vs debian
Drivers are built in, just like macOS and ChromeOS. Done.
> And the Linux alternatives can be down right shit compared to the paid products depending on your goals.
Slow down there. Many of the Linux alternatives are paid products. Like Pixeluvo, which doesn't aspire to replace a well-known photo editor, but is still an alternative. Or Hiri, an email and calendaring client for a proprietary but popular mail server protocol. Or BricsCAD and Dassault Draftsight, alternatives to AutoCAD that support Linux.
You probably didn't intend it, but you were implying there that software vendors shouldn't support Linux because Linux users don't want to pay for software. Microsoft used to claim that, years ago.
Even if I had ever used Windows on the desktop I'd have avoided Outlook like the black plague -- it's not really an acceptable mail client and never has been. By itself, Outlook is often quite avoidable: IMAP on Exchange, Evolution, Thunderbird+Lightning, maybe the new Hiri client now.
But I understand that's not an option in all situations. This wasn't a criticism, merely some information and a bit of perspective. I've been using Unix on the desktop since before Windows, and continued to do so in Windows-heavy environments, and later integrated with Active Directory since it came out of beta and shipped with Windows 2000. Not everyone has similar environments or flexibility, to be sure, but I know of what I speak.
Are you using the default mail app?
The protocol that the mail app uses is going to be increasingly moonlighted by Microsoft. I would only expect more and more problems over time. And Apple hasn't gotten OAuth enabled in the mail app yet.
The Outlook app uses OAuth. And from a desktop standpoint, the best alternative to Outlook that I've seen is Hiri. But on mobile, I haven't really seen an alternative to the Outlook app that I would recommend.