Outlook keeps prompting for credentials (M365 version v2302 build 16.0.16130.20332)

Question

Hi All, Good day. A user has a Hosted Exchange 2016 account: ******@exchange.example.com, and xyz@example.com has been set as primary (ie. alias) in Exchange Admin Panel. The primary domain @example.com mailboxes use another mail server to access emails. After setting up the Hosted Exchange 2016 account ******@exchange.example.com on O365 (M365 version v2302 build 16.0.16130.20332), Outlook keeps prompting for credentials: outlook error.jpg. Could please let me know what went wrong? Thanks and Best Regards,

Answer 1

Hi @Keith Wong ,

There are several reasons why Outlook may be constantly prompting for a password, and you can try the following troubleshooting:

1. Try clearing the Windows Credential Manager. This can be done by going to Control Panel > User Accounts > Credential Manager > Windows Credentials, then finding and deleting any credentials related to the account.
2. Check if the Autodiscover settings are configured correctly for the Exchange account. Autodiscover is responsible for configuring Outlook to connect to the Exchange server. You can test Autodiscover by holding the CTRL key and right-clicking on the Outlook icon in the taskbar, then selecting "Test E-mail AutoConfiguration". Make sure that the Autodiscover results show the correct settings.
3. Create a new profile from control panel: Go to Control Panel > Mail > Show Profiles, remove the old profile and click on "Add" to create a new profile. From there, manually add your email account and see if you can send or receive emails.

You can also refer to this article to troubleshooting: Outlook troubleshooting: Outlook keeps prompting for password.

---

If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".

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.