Hi, kindly check: It seems you're encountering an issue with Microsoft Exchange 2019 when using the web app to download or preview attachments. Let's address this and explore potential solutions:
- Error Message:
- When attempting to preview or download attachments in the web app, you receive the error message: "An unexpected error occurred, and your request couldn't be handled."
- Possible Causes and Solutions:
- Exchange Server 2019 Issue:
- This issue might be related to a recent feature change that triggers an HTTP 302 redirect to a static Office 365 URL when an additional mailbox is opened in Outlook Web App (OWA) and an attachment is selected for download or preview.
- To resolve this, consider installing the appropriate cumulative update for Exchange Server 2019:
- For Exchange Server 2019, install Cumulative Update 8 or a later cumulative update¹.
- Workarounds:
- While waiting for the update, you can use the following workarounds:
- Use Microsoft Outlook Client: Open or download attachments from additional mailboxes using the Microsoft Outlook client.
- Access OWA Light Version: To use the OWA light version, add
?layout=light
to the URL of the additional mailbox. For example: ⁵.- Example URL:
https://owa.contoso.com/owa/SharedMbx@contoso.com/?layout=light
- Example URL:
- While waiting for the update, you can use the following workarounds:
- Exchange Server 2019 Issue:
- Additional Steps:
- Ensure that you've tried the steps you mentioned:
- Clear browser cache and cookies.
- Use a different browser.
- Disable any browser extensions or add-ons temporarily.
- Verify that your browser is up to date.
- Check for network connectivity issues by accessing the web app from a different network or device.
- Ensure that you've tried the steps you mentioned: