This failed on my system as well. The result really screwed my system.
Drivers were now missing, MS teams could no longer authenticate me, and Outlook won't boot up (stuck in processing).
Opening Outlook in safe mode, it won't update my inboxes for any of my accounts.
Rolling back to the restore point just before the upgrade attempt did not resolve any of the Teams or Outlook issues.
None of my attempts at restoring outlook, even re-installing, have resolved the issues.
Great update, Microsoft. nice job.
so 3x a charm. 24H2 installed successfully.
Still getting driver errors for a Citrix app. Tried uninstalling it from add/remove programs, as well as the Citrix uninstaller and it won't proceed. No idea why. I'll keep working on this.
For the Outlook and Teams issues where Outlook was stuck in "processing" and wouldn't complete the book, and Teams couldn't authenticate me, I found the issue, thanks to another blog I found.
Super easy solution found after a full day of dealing with it...
Internet options > connections > LAN settings > check box "auto detect settings" > ok
The 24H2 update apparently unchecked this setting on my system. I never would have found this... my internet connection was not disrupted anywhere except in MS apps.