A family of Microsoft word processing software products for creating web, email, and print documents.
Dear respected,
As per the description, it seems like the Word automatic reset issue is happening on every user in your department that has been on for years. May I know if the department devices are enrolled company PCs? If so, there has a possibility that the IT department made some backend commands integrated accidentally when Office was deployed at first.
Hence, we suggest you contact the IT department to confirm if there have any commands like PowerShell have been integrated before. If not, since the issue is happening on all users, I'm afraid this issue could be an ongoing server-side issue or some related setting cache in the tenant side or at least the department devices backend, which both needs to be investigated through the remote section and collect error logs from back-end to fix this for you and your colleagues.
I suggest that you raise a free support ticket from the Microsoft 365 admin center and report the issue to the related team to get the proper and dedicated support. The support team there has more permission than us, they can help you remotely and collect logs to find out what exactly happened that caused the upload conflict. They may also involve more resources to investigate the issue from the backend. This would be the most efficient way to handle this case for you and your tenant. Reference: Get support - Microsoft 365 admin | Microsoft Learn
Note: To create a support ticket, you must have Microsoft 365 admin privileges, and if you're not an admin for your Office 365 organization, contact the admin for creating a new ticket. Reference: How do I find my Microsoft 365 administrator? - Microsoft Support
Please accept my apologies and regret that I did not resolve the issue and redirected you to the related development team, but the solution to your concern can be found through the HAR logs and suggest that you raise a support ticket from the Office 365 admin center, where the related team will investigate the issue further by collecting the HAR logs.
We are redirecting it to the right support channel to solve the problem. That's why we suggest you contact your administrator or your IT department. They can create a support ticket. Once your administrator or IT contacts them, they will help you as soon as possible.
I am sorry and apologize for it.
Your understanding and patience will be greatly appreciated. I hope you stay safe and healthy!
Sincerely,
Mia | Microsoft Community Moderator