The first reason: The old profile of Outlook may be broken, so the problem of constantly prompting for password keeps appearing, and in order to fix Outlook from constantly popping up password, you have to create a new profile. Personally, I think the reason why Outlook keeps popping up password is that there are two reasons.
Please allow me to make an analysis of what has happened to you. Don't worry, you have to believe that there is a solution to everything. What's worse, they don't know why this happened. Sometimes, when working with Outlook, many people will encounter the problem of Outlook constantly prompting for password. Removed all MS-related entries under Keychain AccessĬompletely reset outlook (Terminal: defaults remove Does the Outlook Continually Prompts for Password - How to Fix? 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. 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. 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). I've just wasted 2 hours trying to resolve the following problem:
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