My experience with the new OneDrive Team Site Sync

Greetings Rob-CTL

Whilst I was testing out on a brand new machine with the user account, I noticed that I keep receiving new files, that are being downloaded. And I confirmed with users, that they keep saving documents locally on the Synced OneDrive folder. 

After performing an additional test, turns out only the download of new versions from SharePoint Online is broken. 

Just to let you know, that everything might not yet be lost, since the edited files sucessfully upload to the Cloud. 

Crisis is partially averted, now to re-sync everything and check if download works as intended. 

Thank you for your help.

Deleted interesting to read that it overwrites the file in that way.  Just an observation but if your users haven't successfully sync'd for any preiod of time you are going to hit a number of sync issues when you resolve the issue so you might need to formulate a battle plan for the users so they are prepared.

Rob-CTL Okay, thanks for the tips, Will test it out today, and see how it goes, will update here later. 

Update.

Tested out what happens if you fully re-install OneDrive client, apply the registry file once more for safe measure.

We initiated this scenario - 

1) Pause Sync for 2 hours.
2) Edit any document on local computer in the synced folder (do not enable sync back on, to simulate pending changes)

3) Uninstall 

4) Wipe OneDrive from Appdata/Local/Microsoft/OneDrive and from registry HKEY_CURRENT_USER/Software/Microsoft/OneDrive

5) Reboot the PC.

6) Run the install of any version of the new OneDrive

7) Run the registry file, that enables preview.

8) Sync all the files.

What happened further - Files, that were mismatched, e.g., edited but not synced previously, had the red X circle on them (sync error), when opening the document, the second it was opened, it overwrites the exact document in cloud completely. Thus rendering any edits in cloud directly discarded whilst the Sync was not working. 

So in a scenario, when 10 people have edited the same document locally from OneDrive synced folder. All of them had issues with Sync afterward, a reinstall would not merge all the 11 versions (including the original), it would overwrite with a version from the person that performs the last sucessfull Sync. 

Therefore Reinstalling OneDrive is no-go scenario. 

Going to atempt to change OneDrive version via registry on a user account when they Sync is actually broken, since I cannot replicate the sync issue on any other computer.

Deleted I see your problem there.  You are correct in the old days with the Groove client if you disconnected a SP library and reconnected it would generally create a new folder on the local PC and sync into there.  Any documents that hadn't sync'd before you broke the initial connection wouldn't get sync'd back.  With the new client you can point OneDrive to use the same folder that was used in the previous sync and it "should" sync everything which means any docs that were only on the local PC would get sync'd back.  Now I must stress I've not tested this so I don't know how reliably this will work so if you were to go down this route I'd do some testing first with test user.

Rob-CTL I really do not want to do that, because I am worried that all the unsynced changes made by the users, that have not uploaded to the Sharepoint, will disappear and everything will be lost. 

E.g., let's say each user has 20 files pending upload to cloud. If I reinstall OneDrive completely, they don't get uploaded. Do they?

So a reinstall might be a no-go.

Curious thing though, I've set up the same sync with a global admin account, and I see files being downloaded as I write this. Going to try with a user account when possible.