I recently had this while uploading thousands of photographs to my ODfB account. Essentially, you’ll set it syncing (perhaps overnight) and then come to it in the morning and you’re presented with the error message, “OneDrive can’t sync now, please try again later”.
I tried resetting the app (onedrive.exe /reset), re-starting, reinstalling, nothing worked. Turns out, there is a limit to how much data you can upload per day.
The setting you want lives in the ClientPolicy.ini :
For ‘standard’ (personal) OneDrive, go to: C:\Users\<username>\AppData\Local\Microsoft\OneDrive\settings\Personal\ClientPolicy.ini.
For OneDrive For Business (ODfB) OneDrive, go to: C:\Users\<username>\AppData\Local\Microsoft\OneDrive\settings\Business1\ClientPolicy.ini.
Please note, depending on your OneDrive setup and number of accounts, the Personal/Business folder name may change.
Open the ini file in notepad and change MaxClientMBTransferredPerDay from its current value to something higher. I found that I needed to change this value to 50000000 in my case. It appears that simply setting it to ‘0’ doesn’t work for infinite, either.
One other observation: occasionally, I noticed OneDrive would appear to change this value back to what it was and fail again. Just repeat the procedure above and it will carry on.
Hope this helps.