ConfigMgr : Refresh Scenario Error 80070002 Post 2012 R2 Upgrade

Issues with the Network Access Account following an SCCM 2012 R2 upgrade are not uncommon:

Despite creating a new account, deleting the old account and recreating boot images we were still running into issues on some refresh scenarios with Task Sequences failing with a 80070002 error code – bare-metal deployments of new machines were fine, using the same boot images.

It turns out that the clients targeted by the refresh Task Sequence we’re still running the legacy, non-R2, SCCM client. After upgrading the client to the R2 version all Task Sequences ran without issue.