Allow external OneDrive for Business users to sync folders
My users frequently want to share folders with external users (customers or partners) and are frustrated to find that these users can't sync the shared folders to their own filesystem. This functionality is widely used in competing solutions, and the limitation is significant enough to keep my users from leveraging OneDrive.

We are excited that B2B sync is now available in Production. This feature allows a user to sync folders that have been shared with them from another organization. For more information see this article: https://docs.microsoft.com/en-us/onedrive/b2b-sync.
90 comments
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Anonymous commented
This is utterly ridiculous that Business users can not share with personal accounts and have them sync. So much for being a dropbox alternative. Make this easy and people will use the service more...
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Tristan commented
This doesn't appear to work for Microsoft personal accounts?
We deal consultants and individual contractors who do not have "Work Or School" accounts. Asking them to create an AAD Tenancy just so we can collaborate on files seems a bit of a stretch?
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Fabio commented
Se non volete una migrazione verso DROPBOX, dovete muovervi a rendere possibile la sincronizzazione di cartelle ONEDRIVE FOR BUSINESS con utenti esterni all'organizzazione!
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Domenica Gambardella commented
vorrei poter condividere un file di one drive con utente esterno limitando tale condivisione alla sola visione escludendo la possibilità di stampa
vorrei poter inoltre limitare nel tempo questa condivisione
E' possibile -
Eric Duncan commented
Something that I just discovered is that if you require MFA for your B2B users, OneDrive sync simply fails on the guest's machine with the message: Sorry, OneDrive can't add your folder right now. Please try again. What we found via a ticket with support is that we were getting a 400 returned on a POST to login.windows.net because MFA was required for the B2B user. Upon excluding that user from the policy, OneDrive was able to sync. Is this something that will be fixed in the near future?
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Ed Dablin commented
B2B sync now working for us
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Neftali commented
All it needs is enroll to Office insider and install Onedrive insider version
https://docs.microsoft.com/en-us/onedrive/b2b-sync
B2B Sync
https://oneclient.sfx.ms/Win/MsitSlow/19.112.0609.0002/OneDriveSetup.exe -
Matt commented
This feature would really help us easily access those Shared Folders to External Users to be able to Sync it to our own File System. We can do it fine with users within the Organization except for users Outside the Organization. This shouldn't be that big of an adjustment feature. Please include this in the future update releases.
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Marco Cotroneo commented
It's a shame that this is still not an available feature!!!
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BD commented
We really need this feature. We share to external Office 365 tenants and they want to sync with their OneDrive apps. But because they can't, they constantly pressure us to switch to DropBox or other competitor products that are out of our control.
Been "Thinking About It" for 18 months now … time to start DOING SOMTHING! Please!
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Bruno Pasquali commented
I Am a freelance. I need to sync folder with another cooperator. I convinced him to subscribe Office 365 business. Now we had to switch to Google drive. He closed his Office 365 subscription.
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Zsombor Fritz commented
Still "THINKING ABOUT IT" only? Come on!
We would like to cooperate together from several different company on a project but we can't work effectively without this functionalitythis request seems to be the same for me:
https://onedrive.uservoice.com/forums/913522-onedrive-on-windows/suggestions/13755849-allow-shared-files-to-be-synced-brilliant-eh -
Anonymous commented
So Microsoft have the some of the best designers and developers in the world working for them, yet they inflict arbitrary limits on what paid users can do.
- Don't have very large files
- Don't have too many files
- Don't try and sync more than 300k files to a PC
- Don't share your files with other people in a useful way.
- Don't expect useful error messages
- Don't expect sync to run until it's finished, re-start & re-install a few times.
- Don't expect to be able to find settings in the admin centre, you only have 4 different pages of settings to pick from.No wonder DropBox is doing so well, OneDrive is a joke by comparison.
PLEASE sort this program out!
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Anonymous commented
Please please!!
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C Colley commented
Would love to move our 500GB of DropBox files to Sharepoint but can't because out resellers wouldn't be able to sync files...
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Alex C. commented
According to https://docs.microsoft.com/en-us/onedrive/b2b-sync this exists now, but it's not working. I'm still getting "Sorry, OneDrive can't add your folder right now." even with the EnableADAL registry setting.
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Anonymous commented
Any news ?
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Anonymous commented
hahahahahahaha ms hahahahaha
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Viktor Vallin commented
The lack of this feature (and block sync for ALL file types) is the only reason we still have to use DropBox. No update since 2017??
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Yosh commented
Any update since September 2017?