Hi @IES Sys Admin
For your last 2 questions, I need more details to troubleshooting.
Thanks for your understandings.
I upgraded the ODT to this version, and ran it and it downloaded the latest files for January.
Could you please share us with your configuration file (.xml)?
If there is MAK key, please cover it.
I am doing a fresh install on my offline network after moving the most recent files and now I keep getting.
I want to confirm whether the environment is clean?
If there is any previous Office product installed, please make sure it is removed completely first.
Besides, please remember to move the newest ODT and Office folder (Office installation package) together to your offline network environment.
When I go to update from the CDN using the new ODT,
Do you mean you used the ODT to install Office 2019 again to update Office? Please also share us with your .xml file.
If you use other method to update Office, such as Run dislog command, please let me know.
In the CDN I have the v64.cab, the latest 16.0.10394.20022.cab, and the folder for 16.0.10394.20022. I have, from what I know, all the required files.
CDN is a distributed network of servers of Microsoft, generally, we can not see the content from it.
If you need to install or update Office in an offline network environment, you need to store the installation package on your local shared folder.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in [our documentation][1] to enable e-mail notifications if you want to receive the related email notification for this thread.