Restrict O365 from adding a cloud storage service from another organisations tenant

Question

Hi everyone,&nbsp;To prevent the potential for data exfiltration through a linked but separate cloud service (see picture) Is it possible to prevent users from my organization from adding a cloud service storage (one drive from another organization0365 tenant assuming they have the necessary credentials to add the service??&nbsp;If this has been asked somewhere my apologies&nbsp;&nbsp;

christianbergstrom · Answer

Kalcite&nbsp;Hello Basil. Yes, it's possible to block third-party storage providers as well as B2B OneDrive sync. There are a couple of options available. See links for more information.&nbsp;Use Group Policy to control OneDrive sync settingshttps://docs.microsoft.com/en-us/onedrive/use-group-policy&nbsp;Policy Setting to Prevent B2B Synchttps://docs.microsoft.com/en-us/onedrive/b2b-sync#policy-setting-to-prevent-b2b-sync&nbsp;B2B Synchttps://docs.microsoft.com/en-us/onedrive/b2b-sync&nbsp;OwaMailboxPolicy (AdditionalStorageProvidersAvailable)https://docs.microsoft.com/en-us/powershell/module/exchange/client-access/set-owamailboxpolicy?view=exchange-ps*edit* (noticed this is available from the M365 admin portal as well)&nbsp;You can also block third-party in Teams.

kalcite · Answer

Thanks for the response... much appreciated! .. will look into the resources provided

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Restrict O365 from adding a cloud storage service from another organisations tenant

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