We have been using MDT 2012 with task sequences for many computer models for years, but suddenly it started to throw the attached error message for some of these computer models. The rest of the models deploys just fine. We cannot figure out why it treats models differently in the pre-selection stage of the PXE booting process. In the process we have also tried to create a completetly new deployment share, but the problem persists. The affected computer models don't have Secure boot enabled in BIOS, however they are brand new.
When we PXE boot one of these clients, this is what happens:
After the initial loading via tftp the screen gets dark
a win8 window appears in the middle of the screen
the 'rotating balls' wait widget appear under this window
the Microsoft Solution Accelerators bacckground appears
a command window opens and closes immediately
a couple of seconds later the invalid credentials dialog appears:
A connection to the deployment share <name> could not be made.
Connection Ok. Possible cause invalid credentials.
retry / Cancel
Anyone here who can explain why a small number of computer models causes problems in this stage of the deployment? Many other models passes this point of deployment (with connection to the deployment share using the normal username and password as ever before).
I hope the above desciption about where in the process this error appears can help you to identify where and
what is going wrong.
Thanks a lot for help on this