New Exchange 2019 Server. Outlook 2019 clients cannot connect. OWA clients can

Question

The connection to Microsoft Exchange is unavailable

Answer 1

Hi @Danny Slye

Thanks for your reply!

According to the error message, there are several troubleshooting steps you can try to resolve the issue:

• Disabling cached mode fixed this for my client. Control Panel> Mail > Email Accounts > Change > More Settings > Advanced > uncheck the box to "Use Cached Exhange Mode".
• Disconnect your work school account through settings and then reconnect it.
• Refer to the settings of this document: https://www.repairwin.com/fix-outlook-error-you-must-connect-to-microsoft-exchange-at-least-once-before-you-can-use-your-outlook-data-file-ost-solved/.

(Note: Since the web site is not hosted by Microsoft, the link may change without notice. Microsoft does not guarantee the accuracy of this information.)

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