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Microsoft Project files open read only from SharePoint.

I have a strange problem. My user is opening MS Project files and they open read only from SharePoint. All other Office files open fine and she can edit them. Any ideas? I googled a few things and nothing worked.

PortletPaul

Are you using sync with OneDrive? There is a possible restriction that is affecting you

Issue:

You have a SharePoint Online document library that requires checkout and you have it synced locally via OneDrive for business. Files opened from either online or from the local synced folder open documents read only with no way to check in or check out files from the Office client.

refer: SharePoint / Office / OneDrive files open as read-only and do not allow check out / check in

Workarounds:

Do not sync SharePoint document libraries that require checkout

Uncheck the OneDrive setting: Office[tab] \ "Use Office 2016 to sync Office files that I open"; If you uncheck this global setting, co-authoring will not work for any file opened from a local synced folder. But co-authoring will work for any files opened from online. GPO for controlling this setting is EnableAllOcsiClients defined at: https://support.office.com/en-us/article/Use-Group-Policy-to-control-OneDrive-sync-client-settings-0ecb2cf5-8882-42b3-a6e9-be6bda30899c#enableallocsiclients

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Edward Pamias

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