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Exchange | Exchange Server | Management
The administration and maintenance of Microsoft Exchange Server to ensure secure, reliable, and efficient email and collaboration services across an organization.
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Thank you for posting your question in the Microsoft Q&A forum.
To better understand the issue you’re facing, may I ask you: Are you saying that you cannot download Outlook Classic on Windows to access your Exchange 2019 mailbox, or that you are unable to sign in to your Exchange account in Outlook Classic and believe the feature to use Exchange Server accounts has been disabled?
If you cannot download Outlook Classic:
You can still install Outlook Classic on Windows. Microsoft provides an official guide here: https://support.microsoft.com/en-us/office/install-or-reinstall-classic-outlook-on-a-windows-pc-5c94902b-31a5-4274-abb0-b07f4661edf5
If you cannot sign in to your Exchange account in Outlook Classic:
Could you share additional details such as the error code or message you see? This will help diagnose the issue.
According to this Microsoft article: https://support.microsoft.com/en-us/office/feature-comparison-between-new-outlook-and-classic-outlook-de453583-1e76-48bf-975a-2e9cd2ee16dd
Exchange Server accounts are still supported in Outlook Classic.
Also, have you tried creating a new Outlook profile and adding the account again? This is a common troubleshooting step for classic outlook issues.
Looking forward to hearing from you!
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