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When you try to access a shared mailbox folder using a WebPart URL specifically designed for Microsoft Outlook Web App (OWA), you receive the following error message:
The Custom error module does not recognize this error
This problem occurs because the Exchange 2013 server attempts to forward the request by proxy to the Exchange 2010 server, which acts as the Client Access Server (CAS). When requesting a proxy, the”?cmd=contents&module=calendar” line of the URI does not persist. Therefore, the proxy request is directed to the inbox of the shared mailbox and not to the specific shared folder as planned.
A majority of our users click on the email icon and receive a page with the following error message: “The custom error module does not recognize this error”. After closing this window and clicking on the e-mail icon again, the error disappears. We receive many complaints about this from our helpdesk. Did anyone else have the same problem? Here’s how to fix it.
Checking the status of Outlook services
First of all, we make sure that the problem is not beyond your control. Some concerned users reported that the problem in their case was caused by a period of maintenance of Outlook.com. In this sense, it is important to remove this possibility from your list of potential offenders.
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To check the status of Outlook services, click on this link (here) and check if the Outlook.com service is checked. If the Details section indicates “Everything is operational”, then the problem is not caused by scheduled maintenance or an unexpected server crash.
Adding an explicit privilege set to users
1. in the OWA folder “C:\Program files\Microsoft\Exchange Server\V14\ClientAccess\Owa” add an explicit authorization for “Authenticated Users” and grant the authorization “Read & Execute”.
2. restart the IIS.
Deleting cookies
Cookies are small files that websites place on your PC to store information about your preferences. Cookies can improve your browser experience by allowing websites to remember your preferences, or by allowing you not to log in each time you visit certain websites. However, some cookies may compromise your privacy by tracking the websites you visit.
- In Internet Explorer, select the Tools button, point to Security, and then select Delete Browsing History.
- Select the Cookies and website data check box and select Delete.
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