Onedrive Sync Client not syncing while Proxy enabled

Question

Onedrive Sync Client not syncing while Proxy enabled

LMS 156

Hi

We have on premise Sharepoint with OneDrive Sync client (Ver Version 20.201.1005.0009). With the Sync client, it's not syncing (it may complete the sync in hours) when we mention the proxy with the browser or with the system (all URLs are enabled with the proxy). But it works fine if there is no proxy. So our understanding is that once the client detects the proxy it misbehaves and won't sync.

Is there any work around / solution for this issues. We found articles saying there is no issue if we use Sharepoint / OneDrive in cloud

Thanks in advance

Oscar Maqueda 611 Reputation points Microsoft Employee

2021-01-12T13:15:51.75+00:00

Hi, so the Sharepoint is local and the Onedrive tries, outside your network, to synch ?
trevorseward 11,711 Reputation points

2021-01-12T19:14:06.607+00:00

Does this proxy require user or device authentication?
LMS 156 Reputation points

2021-01-13T07:14:40.773+00:00

Hi

We have the explicit proxy which requires user authentication. For testing, we disabled authentication with proxy for our accounts, but still it won't work.

Onedrive sync client may / may not work with proxy (most of the time it won't work when we enable proxy). W/o proxy it always works well. At the same time we didn't see any traffic originating from Onedrive to proxy as well.

3 answers

Your answer

Oscar Maqueda 611 Reputation points Microsoft Employee

2021-01-12T13:15:51.75+00:00

Hi, so the Sharepoint is local and the Onedrive tries, outside your network, to synch ?
trevorseward 11,711 Reputation points

2021-01-12T19:14:06.607+00:00

Does this proxy require user or device authentication?
LMS 156 Reputation points

2021-01-13T07:14:40.773+00:00

Hi

We have the explicit proxy which requires user authentication. For testing, we disabled authentication with proxy for our accounts, but still it won't work.

Onedrive sync client may / may not work with proxy (most of the time it won't work when we enable proxy). W/o proxy it always works well. At the same time we didn't see any traffic originating from Onedrive to proxy as well.

Answer 1

DSK 6

Try this and let me know if the problem persists.
Start a CMD in administrative mode
enter:
REG ADD HKCU\Software\Microsoft\OneDrive\PreSignInSettingsOverrides /v 204 /t REG_SZ /d "462"
Restart OneDrive

We have seen the same issue and were able to resolve the sync issue with this key!

Mavaddat Javid 6 Reputation points

2023-05-06T00:48:30.33+00:00

I cannot find any information about what this key is supposed to do. The only Google result is the comment above that recommends it. Nothing else.
Now I'm no expert, but it seems risky to inject mysterious registry keys based on anonymous internet recommendations.
全栈小学生 0 Reputation points

2023-09-13T07:45:52.1166667+00:00

It works. Thank you very much!

Answer 2

Jerry Xu-MSFT 7,961

Hi, @LMS ,

If you are using authenticated proxies, it is not supported in OneDrive. Reference: https://support.microsoft.com/en-us/office/invalid-file-names-and-file-types-in-onedrive-and-sharepoint-64883a5d-228e-48f5-b3d2-eb39e07630fa?ui=en-us&rs=en-us&ad=us#authenticatedproxies

Given this situation, we kindly suggest you vote for this requirement in UserVoice which is the best way to improve our products.

If an Answer is helpful, please click "Accept Answer" and upvote it.
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.

LMS 156 Reputation points

2021-01-13T09:33:39.55+00:00

But we can see that this issue is known to Microsoft for years and many raised the voice and there is no action from their end (even we contacted them). If we use WPAD for the proxy / is there a registry key not to detect proxy by OneDrive. Just looking for a workaround.

The proxy itself is not getting any traffic from onedrive, so mostly it's coding issue with Onedrive itself.

Thank You
Jerry Xu-MSFT 7,961 Reputation points

2021-01-15T07:10:16.897+00:00

Hi, @LMS ,
Yes, it is the limitation of OneDrive. For that, I will suggest you to open a service request about your scenario, exploring a suitable workaround for making the OneDrive to work.

Answer 3

Hi Team,

I'm using Titanium web proxy and I have used it to block the URL. I tried to log in the OneDrive with a 365 account. But, I couldn't. I see that login.microsoftonline.com does not allow login when the proxy is turned on. Also, I have tried the above cmd prompt method, but it doesn't work. I have attached the error image and the code for your reference. Please let me know if there is any fix or workaround.

Cmd: https://prnt.sc/urNn__wiN-E3

Proxy Image: [ https://prnt.sc/0uXlo9tkUvsO]

Error Image: https://prnt.sc/-JQLb00YmGlJ, Couldn't authenticate host 'odc.officeapps.live.com' with certificate '*.officeapps.live.com'

Github: BlockURLApp

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Onedrive Sync Client not syncing while Proxy enabled

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