Hi Rob, Sorry for the delay reply. If you want to make sure to keep all your emails, you try to copy the whole profile that exists in ~/Library/Group Containers/UBF8T346G9.Office/Outlook/Outlook 15 Profiles/Main Profile to the same location after reinstalling Outlook.

Outlook for Mac is a disk space hog but the macOS has a way to recover some of that. Mac computers can have relatively small hard drives like 128GB or 265GB which Outlook 2016 for Mac can gobble up. Get help with your Outlook 2016 for Mac questions, and see what others are asking. Make sure the Online/Offline toggle switch is set to ON. Or people folder. Aug 14, 2016  In Outlook for Mac, the exported backup file for mailbox is the.olm archive file while the PST file is used for Outlook for Windows. An archive file in Outlook 2016 for Mac is a.olm file that you can save to any location on your Mac or on a different machine for safekeeping. Jun 27, 2018  Outlook 2016 for Mac: Make sure that the Outlook 15 Profiles folder is stored under the ~/Library/Group Containers/UBF8T346G9.Office/Outlook folder. Outlook for Mac 2011: Make sure that the Microsoft User Data folder is stored under the ~/Documents folder.

Meanwhile, I notice that you said you imported 16GB files stored in On My Computer folder, but you only got 1.1GB file when you exported them to a.olm file. According to my tests, the content of On My Computer folder does exists in your exported.olm file. Given this situation, please make sure you have already selected all your Outlook items when exporting. If you have selected all but you still have this situation, to better help you, we recommend you contact our dedicated support team via Outlook for Mac > Help > Contact Support to seek further assistance. The engineers have more professional experience of Outlook for Mac to help you with your concerns.

I truly appreciate your understanding. Best Regards, Sylvie.

Hi Melon, It works sending from OWA. It also works sending from Windows - Yes. Everything works EXCEPT Outlook for Mac. It works just fine with the built-in Apple Mail, so it is only Outlook for Mac that does not work.

What causes this problem? Is there a limit on email accounts for mac. I'm sure the problem is at my Exchange server since Office 365 works just fine on Outlook for Mac. I have tested on multiple Mac computers with multiple users and this happens to them all. It has been multiple months now and I still havent figured out the problem. Though I'm sure its a problem with Microsoft Exchange.

If you’re an MS Outlook fan, you would have tried out Outlook 2016 preview for Windows. And if you have, we’re sure that you would have been excited after experiencing its features With improved visual tweaks and minor feature updates (Attractive Colourful theme and Ribbon interface, advanced help option, rotation support for the tablet), Office 2016 for Windows will be offering the same kind of upgrade that was offered to Outlook 2013 was launched. However, this Outlook version being aimed at IT developers and professionals requires an active Office 365 subscription.