We have a SharePoint 2010 calendar that we all use for resource planning. Everyone connects their Outlook 2010 to this calendar to view/edit it. Until recently we had no issues with Outlook asking for credentials to SharePoint. The details when it worked:
Everyone was running IE9
Everyone had the same login/password on their PC and SharePoint (PC's are local and SPS uses AD. AD is ONLY used for SharePoint authentication, NOT the PC's)
Everyone added the SPS site to their trusted sites list and clicked remember password
Everyone selected "Automatically login using current username and password" in Trusted Sites Custom Level
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When the problem started:
As various users upgrade to IE10, the annoying popup for login comes back each time they open Outlook
NO IE9 users have this problem
I cannot find a solution. Any help would be appreciated.