Removed all MS-related entries under Keychain AccessĬompletely reset outlook (Terminal: defaults remove com.microsoft. On Windows, this problem can occur as well but it can easily be solved with the registry setting "ExcludeExplicitO365Endpoint", which doesn't seem to exist on macOS. It doesn't matter if we enter the correct password or not, it shows up every time. Ensure that the Method field is set to Username and Password. We cancel the 365 sign-in prompt and the account is successfully set up.īut unfortunately, the 365 authentication prompt (username suggested: reappears at every Outlook launch. Open Outlook 2016 for Mac and enter your SFU email. At the same time, the AutoDiscover confirmation prompt appears, which we accept. When we try to add said mailbox in Outlook, a modern authentication dialog is shown. The affected user has a mailbox with the UPN and mail address which is hosted on said Exchange 2019 organization. There are no Exchange Online mailboxes at all in this tenant, because they've got On-Premises Exchange 2019 (DAG). Outlook is activated through an AD synced Office 365 account with username This account only has an Microsoft 365 Apps for Enterprise license assigned. We have a Mac with the newest macOS and the most recent Outlook version v16.66 (it's evil). If Autodiscover is not configured correctly, you will be getting 'Unable to verify account name or password'. I've just wasted 2 hours trying to resolve the following problem: Under System Preferences -> Internet Accounts -> Exchange account, once you specify the email address, click Configure Manually.
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