I came across an issue today that related to installation of the vShield 5.1.1 management appliance with the VMWare SSO Lookup service.
If you get the folowing error:
Initialization of Admin Registration Service Provider failed.
Root Cause: Server returned ‘request expired’ less than 0 seconds after request was issued, but it shouldn’t have expired for at least 600 seconds.
Then the issue is likely to be that the server the SSO component is installed on is out of sync time-wise with the vShield manager. This was evident in my environment due to the differences between BST and UTC timezones that were set on the two servers respectively.
In the end I set the vShield managers time to UTC properly and reboot.
set clock 09:00:00 05 08 2013 (when it was 10am BST)
This allowed me to join the vShield manager to SSO successfully.