Article ID: 2680383 - View products that this article applies to.
Consider the following scenario:
This issue occurs because Outlook Web App does not cancel the Loading dialog box.
To resolve this issue, install the following update rollup:
(https://support.microsoft.com/kb/2685289/ )Description of Update Rollup 3 for Exchange Server 2010 Service Pack 2
To work around this issue, use one of the following methods.
Method 1When the Loading dialog box does not disappear, refresh the page.
Method 2When the Loading dialog box does not disappear, press the Esc key.
Method 3To avoid this issue, disable the Conversation view in Outlook Web App.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
For more information about how to let someone else to manage your mail and calendar, go to the following Microsoft website:
How to let someone else to manage your mail and calendar
Article ID: 2680383 - Last Review: June 27, 2012 - Revision: 4.0