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High Sierra and MS Exchange Problems anyone?

After 2 days the Apple mail app under High Sierra stopped working with Microsoft Exchange. New emails are not displayed. After removing the Exchange account, and setting up again, still no folders or mails can be received. The account (under email--->settings) definitely has connection to the exchange server (btw: Exchange 2010 on SBS), there's the "green" light. When setting up the new exchange account I noticed that this is handled differently to former versions of MacOS. There's no possibility to enter a "server", although in mail-settings-accounts the "internal and external URL" can be configured...but this changes nothing. Also (when having no server certificate) in former versions there was the small "warning triangle" beside the exchange account in the "tree" which could be clicked and the missing certificate could be ignored. Not so in High Sierra. Anyone with similar problems? Solution? thx

Posted on Sep 29, 2017 1:08 PM

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Posted on Dec 5, 2017 5:23 PM

Let's clear up some confusion. I think I misunderstood when you wrote the following.

Exchange mail from Outlook in my Apple mail

You are not using Outlook.app but Mail.app to connect to your Exchange account. Both apps can connect to multiple types of email accounts. Exchange, IMAP and POP. What the window users in your company use to get Exchange has nothing to what you use on your Mac. What matters is the version of Exchange server.


Apple Mail can connect to Exchange as long as it meets one of these requirements.

Exchange Support

Requires Microsoft Office 365, Exchange 2016, Exchange 2013, or Exchange Server 2010 (SP2 or higher).


Try this to fix your Exchange account.


Remove the Exchange account in Mail > Preferences > Accounts.

This takes you to System Preferences > Internet Accounts.

Uncheck to remove the account. Not just uncheck Mail for Exchange.


In your User's Library/Mail folder....

  • Verify the Exchange data was removed when you removed the account.
  • Go to your User's Library > Mail > V5
  • You'll see alphanumeric folders, look inside. If you see the Outbox, this is the local "On My Mac" folders.
  • We don't want to find a folder for Exchange. Check to verify that is was removed. If you find the folder, then with Mail quit, delete the alphanumeric folder containing your Exchange data.
    Clutter is a default Exchange folder, Exchange also has it's own Outbox. This shows Exchange account (the alphanumeric numbers are unique). You might also see custom folders you have created.
    User uploaded file


Next.... in V5 you should see a MailData folder. Delete any files with Envelope in the name.


Back in System Preferences > Internet Accounts

  • Add your Exchange account back.
  • Open Mail, It will reindex your messages.
  • Exchange will download again from the server.



My advice: When a new version of macOS is released DO NOT upgrade until it has matured. Unless there is some urgent need to upgrade then wait until the final version (.5 or .6) is released to upgrade. Lastly, check here in Apple Discussions to see if Exchange users are having any issues.

58 replies

Oct 11, 2017 4:44 AM in response to len.iphone

Hello len.iphone,


I thought you are using Exchange 2010 and have hands on the server as well.


On the other hand, my best guess is still to make sure the latest Exchange 2016 updates (since 2016 called CUs - "Cumulative Updates") are installed. The latest is called CU7 and was release September/19 [Microsoft Site: Exchange Server Updates: build numbers and release dates]

You might want to contact your provider then.

Oct 11, 2017 12:48 PM in response to dianeoforegon

Hi dianeoforegon,

I have Exchange through Office365 and have issues in Mail and on Office365.

It asks me for password of the 365account. but after insert of correct password, it tells me: "unable to verify account or password".


after trying closing and reopening Mail, the 365Inbox disappeared on top, where I see all my inboxes (gmail, .me, ...) displayed.


can you help me please?


thanks a lot

andrea

Oct 11, 2017 2:18 PM in response to andreacls

It asks me for password of the 365account. but after insert of correct password, it tells me: "unable to verify account or password".

You need to reset your password. At the login screen, select to reset password. If you have an IT admin, ask that your password auto reset after xx days is set to never.


You first have to be able to login to your O365 account to verify your Exchange account.

Oct 21, 2017 6:01 PM in response to PianoMax

The only way I seem to get new Exchange emails nows is when I hit Rebuild Mailbox. Then all messages I know should be there from looking at Outlook on my work PC or the Android Outlook app, show up.


Any thoughts on why this does it every time? I have deleted and set up the account fresh since I forst noticed the issue of not getting ANY messages.

Oct 24, 2017 11:45 PM in response to leventv

It seems that I've solved the problem with my Mac Mail app,... with Exchange (Office365) and with all other email accounts (like gmail).

I canceled all the Exchange and Gmail passwords in the "key chain" app.

then I canceled all the accounts (Exchange and Gmail) from System Preferences/Internet Accounts and set it up new.

I had to try it 2/3 times, but then, incredibly, it began to work.

At the moment everything runs like before (with Sierra).

I hope it helps you too.

Nov 7, 2017 10:28 AM in response to laurinkdavis

all of my folders are showing up as "Inboxes", which means the Move function does not work properly.


Could you post a screen shot of your folder list?


Command-Shift-3 takes the entire screen

Command-Shift-4 takes a portion of the screen. <--use this one


Click on the camera icon in the toolbar of the reply window to post. Select image to upload.


Be careful not to include any private information.

Nov 10, 2017 2:28 AM in response to leventv

Hmm. Okay, so let me expound a bit on the oddities I encountered and hopefully it might help you. I encountered a very odd issue on my MBP Early 2011 that I did not experience on my iMac 2013 upon updating to 10.13.1. Oddly, my iMac installed the update just fine, however, my MBP installed it, went through all the motions, said the installed was completed and showed new various 10.13.1 features present, but somehow did not complete installation and I still encountered the issues you’re describing. When I would go to “About This Mac,” no matter how many times I would installed 10.13.1, it would still have the prior version of “10.13” listed there as the version the MPB was on. After speaking with several tiers of Apple Support, they all escalated it and I had to schedule another call for an Apple engineer to help resolve it. It was totally baffling to them and myself. Before that next call, I did more research and decided to reinstall the entire OS clean (and BTW doing so did a clean install, but did not require me to reinstall all apps or re-download or lose any files, ie - from Dropbox, files in my desktop, etc), and it automatically updated to 10.13.1 in the process— which I didn’t necessarily expect. Did you try a fresh re-install of the OS? What year/kind of Mac are your running? Agaib, a very important (and peculiar) thing to note is that when it looked like I had installed 10.13.1 but it really hadn’t fully installed, I never thought to look at “About This Mac” to verify it read version 10.13.1 and not 10.13 because several of the features of 10.13.1 were present on my MBP— even though it still read 10.13— such as the feature “split screen view when in full screen mode” in the Mail app. Meaning, when Apple shared my screen, they saw these features present so we’re very confused by the “mail sync, etc” issues still being present. But I was good after a fresh install. Hope this helps or at least reduces some things that could contribute to issues you’re encountering.

Nov 10, 2017 4:54 AM in response to AkiraTheBad

Thank you very much for the detailed information. I checked the version is 10.13.1. I am using a MacBook Pro (Retina, 13-inch, Mid 2014). The strange thing is the issues are definitely present while using the Thunderbolt Ethernet Connection. When I use Wi-Fi for internet connection, everything seems to be working for a while. Inbox syncs, some of the Folders sync. But eventually it stops working again when I connect the ethernet connection. Then I would have to restart the Mail app to fetch new mail and click on each Folder to sync them every time I need synchronization or to check for new mail.

Nov 12, 2017 9:01 AM in response to PianoMax

I fixed this by starting a VPN session into my workplace, and then starting Outlook. The connection and folder sync happened properly.


I stopped Outlook, then signed off the VPN. After that, Outlook works okay; connects and syncs no problem using regular internet connection. This also stopped Word from hanging on exiting.


So I guess it gets the certificate over VPN and can then use it in all instances.


Hope this helps!

High Sierra and MS Exchange Problems anyone?

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