High Sierra and MS Exchange Problems anyone?

What version of Outlook? Outlook 2011 v14.7.7 is the last version of Outlook 2011. It's an End of Life product now. It's also 32-bit. 32-bit apps do not work well with High Sierra. You need to upgrade to Office 2016. You want the subscription not the product. Office 2018 is already in beta. subscription includes updates where a retail copy does not even qualify for upgrade pricing.

If you want to do the 30 day trial download here.

http://products.office.com/en-us/try

Buy via Amazon and get a keycard for approx $85 for the first year for 5 installs but if you have only one device it's ~$59.00. Microsoft charges more per year.

Thanks. I work remotely for a company that uses the 2010 version of Outlook. I'm the only Mac and trying to explain the issue gets me the "why did you upgrade without telling us?" which doesn't matter because they wouldn't have known to begin with. So, explaining that the company needs to upgrade their Outlook for my one little Mac won't get me anywhere. I'll be better off uninstalling High Sierra and going back to what I had before. I can also access my Outlook mail via Safari (which most in the company access via a browser) so I may just remove it from Apple Mail. It also comes to my phone just fine and I am using the latest iOS on that. By the way there's no Microsoft product in my Applications folder so I am thinking it's just logging in to their server that downloads my company email. ??

Thank you. Yes, clearing up confusion. When you said, you need to upgrade to the Office 2016 subscription I thought you meant a software subscription just like I subscribe to the Adobe Creative Suite online. I will definitely see if I can follow the instructions above. Obviously I'm not a technical wiz with any of this, but I will let you know what happens. Thanks again!

Exchange 2010 works just fine with Mac mail.

Exchange 2010 must be upgraded to SP2 or later to work with Mac mail. I upgraded our Exchange 2010 server to the latest SP3 to be safe and Mac mail works just as expected.

Someone else already mentioned the Exchange SP3 upgrade in this thread. I'm just re-confirming.

No need to go to Spark mail or even use Outlook. Have your sys admin upgrade your Exchange server to the lastest SP and all will be fine.

For us, it was a missing support for http/2 in High Sierra. Here's how we fixed it:

https://tompaw.net/unable-to-verify-account-name-or-password-high-sierra-bug/

Apple, either fix this or post some info about it under "Preparing your Organization for High Sierra"!

I am glad it is working for you. But there are lots of us for whom it does not work. There sure is a bug after High Sierra. I have the same server configuration as you do. Exchange 2010 SP3. But it still is not working as it is supposed to be. I can not get new email unless I restart the Mail app or rebuild the folder.

Also synchronization of the folders is not working unless I click on each folder.

I chatted with apple support. It is really simple, I was spent so much time looking for a solution to this. It was as simple as Open Outlook on safari and navigate to 'Security' and find the location of 'Create an App Password'. Next go to Mac Mail > Mail > Add Account > Exchange > and paste in your app password which you just created through Outlook.com.

I have had no Exchange email (Outlook) since installing High Sierra OS. However, my company just migrated to the new Office 365 and a new server, and Exchange now works great with High Sierra OS. I am once again receiving my Outlook email in my Apple mail with my other email accounts. Thank goodness!

Just to add to this - the problem I had was on a Office 365 account with MFA enabled. I discovered that with MFA enabled the Microsoft Outlook App would work correctly with the proper MFA 2 factor authentication. However the inbuilt apps (calendar contacts etc) would not connect using a App password created from 365.

The solution was to change the Microsoft Outlook App to also use a App password rather than using the correct 2 factor method. Suddenly all the Apple apps authenticate correctly.

I'm presuming this is down to the account in the keychain being used for both applications? At least that's the only explanation i can come up with!

Select Always Trust. Default uses System Defaults.

Usually Mail and Outlook have the same requirements for Exchange. Sounds like your Exchange server needs updating.

I decided to go ahead and start a new thread, there is a screenshot in that one: Mail not syncing correctly with Exchange 2010

Did you setup in System Preferences > Internet Accounts. This seems to work better than trying to setup in Mail.

Did you select to Trust the certificate?

I'm assuming you have Outlook. Try adding to Outlook and see if it works.

What is your Exchange build number/version?

Hello Tom,

my provider is using exchange 2016