Symptoms
When a user wants to access Microsoft Dynamics CRM records within the Microsoft Dynamics CRM for Microsoft Office Outlook client, they may encounter intermittent prompts for credentials.
Cause
The issue occurs because of a problem in Internet Explorer problem that causes session cookies to be cleared out and requires users to sign in again.
Resolution
The Internet Explorer team has addressed this issue as a hotfix, which can be found in the following Microsoft Knowledge Base article:
2926827 Web browser control hosting application may lose session information unexpectedly
More Information
This issue affects both Internet Explorer 10 and Internet Explorer 11.
