A Microsoft file hosting and synchronization service.
Hi Navin,
This issue could be happen if your users are co-authoring under an unstable network.
When co-authoring with other users, Office will autosave the file to the server, so the other users can see your modification on this file.
However, for some reason, if the user's file was not synced to the cloud for a long time. And the others don't have this issue. This will cause the conflict.
Using Excel application, for instance:
The user's file is not synced properly to the cloud and he input a value in the A1 cell, and his colleagues also update the A1 cell as they did not see his modification. So when the user's sync function is back to normal, it won't be able to handle the sync process as there are 2 different values for the A1 cell. So OneDrive will return this error and ask the user to merge the changes.
Regards,
Alex Chen