Files on Demand - The Cloud sync engine failed to validate the download - Error 0x8007017F

Matt_Ignite
Copper Contributor
May 15, 2019
I'm seeing the same as PhilineVon at a client site. Lots of 0x80070185 errors ("The cloud operation was unsuccessful"). It seems to be affecting certain users more than others within the same library?

The document libraries at this client's site are very large - 199k files in the main one. I'm wondering if that's just too many files for the sync agent to handle? The official documentation states that OneDrive for Business can reliably sync up to 300,000 files, but it's the only thing I can think of?

I just wanted to throw my hat in the ring here too in case anyone finds a solution.

Cheers,
Matt
- kevinmckeown8
  Iron Contributor
  May 30, 2019
  Matt_Ignite take a look here for a couple of suggested solutions:
  
  https://techcommunity.microsoft.com/t5/OneDrive-for-Business/Error-code-0x80070185-When-opening-Sharepoint-files-via-OneDrive/td-p/378592
  
  https://answers.microsoft.com/en-us/msoffice/forum/msoffice_drive-mso_win10-mso_online/error-code-0x80070185/9d5b8fe2-c691-42bd-be35-5dd31fba15c8
  
  I still think the easiest solution for individual users is to set all files to "Keep offline" then push them all back to the cloud "Free up space", but Justin Kropp's solution may be a better way to clear up the issue for multiple users.
  - Matt_Ignite
    Copper Contributor
    Jul 10, 2019
    kevinmckeown8 - many thanks again for your recommendation here.
    
    Early last week I ran Justin's powershell scripts against all the document libraries for the customer, and reset the OneDrive cache on the worst-affected user's PCs. In the week since, the users have reported absolutely no re-occurrences of this error. Originally, we were hitting the error on EVERY Excel document that we opened from the synced library. This is a BIG change. So I'm calling that a success.
    
    I'm planning on calling into the client site later this week to confirm with the team in person, but for now I'm pretty confident.
    
    Thanks very much for pointing me in the right direction. I really appreciate the assist!
    
    Cheers,
    Matt
Nick_Loenders
Copper Contributor
Apr 01, 2019
Has anyone found a solution for this 0x80070185 ??
- Jeff_Baral
  Copper Contributor
  Apr 08, 2019
  We are having this issue 0x80070185 since February 2019. Any solutions yet?

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Files on Demand - The Cloud sync engine failed to validate the download - Error 0x8007017F

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