Building, integrating, or customizing apps and workflows within Microsoft Teams using developer tools and APIs
Sure. User can share and collaborate on files saved in 3rd party storage location in Box, Citrix ShareFile, Dropbox, and Google Drive. Office 365 Admins can configure the individual storage providers in the Office 365 Admin Center.
For more information, please refer to https://techcommunity.microsoft.com/t5/microsoft-teams-blog/microsoft-teams-adds-third-party-file-integration/ba-p/80880.
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