To reply to my own email:
This is now fixed.
I originally ran these steps for the upgrade:
# yum install
http://resources.ovirt.org/pub/yum-repo/ovirt-release40.rpm # yum update "ovirt-engine-setup*"
# engine-setup
There were no errors reported during the process. I could login as the internal user without any errors. It was just using an external provider, which made me think it was an aaa issue, so I looked
at the certificate exported from AD which had an expiry of 2063.
I tried running engine-setup again, and this fixed the issue. I have no idea what happened along the way, I will check the logs. I notice it reports:
[ INFO ] Upgrading CA
so it looks like it creates a cert. Why it would have created one with such a short expiry date is a mystery to me.
Hope this helps anyone who might come across this issue