Office 2019 ProPlus \ Server 2019 \ WAM Authentication issue Outlook logon with password

Hi, I testet all options but unfortunately without solution.
-> Question: Configure modern authentication in Exchange Online or Exchange Server -> is it necessary to enable for OnPremise and Online or only ExchangeOnline?
-> credentials prompt settings -> it is disabled
-> cached mode is NOT selected
-> testet with complete new user profile, i tested with if (-not (Get-AppxPackage Microsoft.AAD.BrokerPlugin)) { Add-AppxPackage -Register "$env:windir\SystemApps\Microsoft.AAD.BrokerPlugin_cw5n1h2txyewy\Appxmanifest.xml" -DisableDevelopmentMode -ForceApplicationShutdown } Get-AppxPackage Microsoft.AAD.BrokerPlugin
-> if I delete the aad entries in credential manager it works until I log in newly the password promt occurs again
I heard that there is a Microsoft issue with Server 2019 and WAM and the only solution is to disable WAM, which is not supported by Microsoft, so what to do best?
Regards

Hello thank you for your response and sorry for my late reply. I will try your suggestions and report back again.
Regards

Hello

I am Abdal and I would be glad to help you with your question.

Here is a detailed solution to resolve the issue of Outlook logon with password in combination with WAM Authentication and Office 2019 ProPlus/Server 2019:

Configure modern authentication in Exchange Online or Exchange Server:

Modern authentication is a process that enables identity management for client-server applications, such as Outlook, to use Single Sign-On (SSO) to authenticate to Exchange. You can enable modern authentication in Exchange Online by using the Exchange Admin Center (EAC) or by using the Exchange Management Shell.

Check the credentials prompt settings in the Outlook client:

In the Outlook client, go to File > Options > Account Settings > Account Settings. In the Account Settings window, select the email account and click the Change button. In the Change Account window, make sure that the "Use Cached Exchange Mode" checkbox is not selected.

Reset Windows Credential Manager:

In Windows, you can reset the Windows Credential Manager to remove any cached credentials that may be causing the issue. To do this, go to Control Panel > User Accounts > Credential Manager. Find the entry for the affected email account and remove it.

Update the certificate that the Microsoft AAD Broker Plugin is using:

The Microsoft AAD Broker Plugin may be using an outdated or invalid certificate that is causing the issue. You can update the certificate by downloading the latest version of the plugin from the Microsoft website and installing it on your system.

These are the steps that you can follow to resolve the issue of Outlook logon with password in combination with WAM Authentication and Office 2019 ProPlus/Server 2019.

I hope this information helps.

Regards,

Abdal

It seems Microsoft fixed the issue with their update Version 1906 (Build 11727.20224) of June 26th 2019.

https://docs.microsoft.com/en-us/officeupdates/monthly-channel-2019#version-1906-june-27

So if you encounter this issue, be sure that you are patched to this version or later.

Incoming Mail (IMAP) Server

Server - imap.mail.yahoo.com

Port - 993

Requires SSL - Yes

Outgoing Mail (SMTP) Server

Server - smtp.mail.yahoo.com

Port - 465 or 587

Requires SSL - Yes

Requires authentication - Yes

Your login info

Email address - Your full email address (*** Die E-Mail-Adresse wurde aus Datenschutzgründen entfernt. ***)

Password - Your account's password

Requires authentication - Yes