Cannot preview attachments and download them from owa. Any ideas how to fix it ?

Question

Hi

I have exchange 2019 last update. Desktop app works excellent ,but in web app I cannot download or preview attachments.

When I try to it gives me this error message : An unexpected error occurred and your request couldn't be handle

Had tried this steps:

1. Clear your browser cache and cookies, then try again.
2. Try using a different browser to see if the issue persists.
3. Check if there are any browser extensions or add-ons that may be causing the issue and disable them temporarily.
4. Make sure that your browser is up to date.
5. Check if there are any network connectivity issues by trying to access the web app from a different network or device.

didn't fixed my issue.

Answer 1

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:

1. 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."
2. 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
3. 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.