You may already take a look at our previous post
Case Study – How to Enable or Disable “Remember my credentials” in IE in credential window.
According to KB229940: to disable password caching, locate and set:
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\DisablePasswordCaching to 1.
I recently encounter an issue in Windows 2008 R2 IE9 and IE11. It shows above registry value doesn’t work. “Remember my credentials” still appears in IE credential windows with DisablePasswordCaching 1.
After some debug trace, it shows it hits KB2893519 on OS.
"Remember my credentials" option cannot be hidden when the SspiPromptForCredentials function is called in Windows
After applying above KB, the DisablePasswordCaching does work to hide “Remember my credentials” in IE credential window in Windows 2008 R2 IE9 and IE11.
Anik Shen from APGC DSI Team