We have several Windows Server 2003 boxes available , and last night, tech admin guys had installed their Microsoft March 2013 Security patches around 12 installed.
This morning, users cannot access sharepoint sites they were previously able to, and are prompted for credentials. When entering their credentials, authentication seems to fail.
Users always frustrating even they has entered correct domain name,user name and password.
But I am an share point admin, I tested the sites inside the server using system account and normal users account, which is working fine.
When i am accessing the share point sites from other laptop or system using normal account, it is keep on prompting credentials.
I checked windows event logs,sharepoint logs and DB logs, we didnt get any clue regarding that issue, so we asked to tech admin to uninstall all Mar 2013 patches installed by last night, he only unistalled two web front end servers and DB servers and AD server. Then i tested again it is again prompting user name and password for normal users.
Finally the sites are working for all users, Because Tech admin should forget to uninstall the patches on the two Domain Controller server.
Mainly Uninstall this patchesKB 3002657
After that We checked the share point sites can be accessible to all user's without prompting credentials
We also referred the below sites, thanks for your valuable suggestion and gave sleeping time by tonight otherwise ...we might be spent to research for other parameters, my courtesy in the below sites, bcos we found the root cause of the issue for installed Mar 2015 patches denoted in the below site.