Ok, so the problem is now fixed.  We discovered the SAN has premium support with EMC, so logged a support call. An Engineer remoted into the service shell, and gave himself root access (disabled by default) There was a password persistence file missing, called c4_2_1_UIS_adminPasswordSet. Once this file was recreated, both passwords were reset back to defaults and we could then login.  This bug and the symptoms we were having are described exactly in KB article 92448, but as  this article's audience is Employees and Partners only, we would never have found it..  Thanks for everyone's help anyway
[IMAGE]Hi All, I have a problem that is starting to drive me crazy. We have a VNXe3100, that is working fine, has had more disks added, and I need to login to the admin interface to configure them. Unfortunately, no one has logged into it in some time, and the admin credentials we have documented seem to be wrong. I've gone ahead and pressed the password reset button on the back of one of the controllers, and logged into the gui ok with admin/Password123# The first thing it does is bring up a window asking me to change the password, that is put in  and once ok is clicked, displays "Configuring new passwords" and there it stays. Forever... Now, even though it doesn't change the admin password, it DOES change the  service password, as I can then SSH into it using the new credentials for the service account. I noticed that the red asterisks next to the service account old and new password fields disappear a few seconds after hitting OK, but don't do so for the admin account.  I tried to change the admin password using the UEMCLI, but it just says "You have to change the administrator password in order to perform this action" Short of completely initializing the system back to factory defaults and losing 5TB of data, is there a way to get around it ? (maybe the config file on a USB stick used to manually reset the ip address ? )  Cheers
Can't reset VNXe3100 admin password