
Many people configure their primary email domain the same as the UPN, which is then the same as their default Office 365 domain. Update – The above is also true if your autodiscover record points to your on-premises Exchange server, so if you have no on-premises mailboxes, change that to. However, as covered in this Microsoft Support article, when using a hybrid setup between Exchange on-premises and Exchange Online, Office 365 Groups won’t show in Outlook when the email address of the group is anything but (with ‘contoso’ being your Office 365 tenant name). The user doesn’t have to do anything, they just show up. Normally, any Office 365 Group a user is a member of, will show at the bottom of their mailbox folders under a section called ‘Groups’.

Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.If you’re running Exchange in hybrid mode, there’s a big gotcha with Office 365 Groups and the ability to display them in Outlook 2016. If an Answer is helpful, please click "Accept Answer" and upvote it. If I misunderstand your issue or there is any update, please feel free to let me know.

Please try to recreate your email account and using a complete new datafile to see if this issue could be resolved.
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If everything can work fine in Online mode, I'm afraid that the key of your issue might indeed be related to the existed datafile.

So, to confirm if the issue is related to your existed datafile, it is suggested to change to Online mode(File > Account Settings > Account Settings > Double click your email account > uncheck Use Cache Exchange Mode > restart your Outlook) and see if you can see all the emails in the mailbox normally. Hi this issue only happen in this specific Outlook client? To confirm if your issue is related to this specific Outlook client, it is suggested for you to do the same tests on other Outlook clients and see if the issue has any difference.Īs I know, when using Exchange email account with online mode in Outlook client, Outlook will directly access emails from your mail server without caching to local data files.
