Problems creating a Office 365 exchange account in mail

I know this is old but wanted to post an answer since I have been having this problem and found a fix that is working for me.

What you enter in the "Name" field when adding the Exchange account must exactly match the Full Name set up in the Office365 admin panel. Obviously the email address and password must also match and that can be tested using the OWA login.

I can reproduce this error with multiple accounts by entering only the first name, or the wrong name, and as soon as I correct it the account creates successfully.

Hope that helps someone.

I'm using OS X Mavericks 10.9.4 and had the same problem. OSX would not set up my exchange (office 365) account, even though my iPhone did just fine with the same info (email address and password). It didn't surprise me too much, because of what I learned on this thread: Re: Mac Mail - Not working with my Exchange account?.

Although the OSX "Internet Accounts" pane in "System Preferences" would ask for the same info, it would just crash and report: “There was an error in internet accounts preference pane”, so there was no way to add a new “Exchange” account. I learned online that I could at least create the account by taking the computer offline while setting it up in "Internet Accounts". So, I did that, and got the account created (I used "outlook.office365.com" as the server name). Then I put the computer back online and went into Mail->Preferences->Accounts, and selected the new exchange account on the left to get to the details of the exchange account. Under the "Account Information" tab, all I had to do was to enter my whole email address as the “User Name” - then it started to successfully connect to the exchange server.

Maybe this will help some too.

I started to do this "offline" method, but decided to try an alternative spelling of my name as Craig_VXIT indicated might work, and it all seemed to set up fine. Clearly for me at least the crashes of the "Internet Accounts" part of "System Preferences" and Mail.app's crashes when setting up the account in question are tied to some problem with the "name" not correctly matching what the Exchange server is expecting (ie. "John Smith" vs "John Paul Smith").

Entering the full name exactly as Office365 info did not fix the issue. Still having the System Preferences error. The only fix have found is to enter an Office365 account that works into Internet Accounts Exchange, once you see the 'Account Summary,' you select back, then enter the Office365 account with the issue.

This is a bad and basic bug and reflects poorly on Apple - shame on them for continuing to sabotage anything outside of their environment.

If Microsoft wants it to work on an Apple computer, they need to write their software to do that.

Send Apple feedback. They won't answer, but at least will know there is a problem. If enough people send feedback, it may get the problem solved sooner.

Feedback

Certainly Microsoft has not distinguished itself in being compatible for Mac, but when it comes to email it is the mail client's job to support the mail server, not the other way around. The mail server simply needs to define Exchange, IMAP, or POP protocols that the client should adhere to.

This worked for me, thanks friend.

Thanks tfergus0! Worked perfectly...One thing was that I also had to make the username change in my calendar settings so that my Exchange calendar would show up in iCal.