We are using a Dell Sonicwall NSA 4600 on Firmware SonicOS Enhanced 220.127.116.11-20n, we use the content filtering module on it to restrict users website access , using SSO and LDAP to AD.
Through out the day users will randomly lose their internet policy and get the default policy blocking majority of websites. I have found by locking and unlocking the PC it restablishes the policy and they can continue in the majority of scenarios to browse the internet again.
I have disabled AV (SEP) and it still happens, all users are on Windows 7.
Any help would be appreciated!