If you use Microsoft’s OneDrive Groups group-collaboration feature, you’ll need to find something else soon: According to Engadget, Microsoft will shutter OneDrive Groups on October 16th.

Once OneDrive Groups shut down, you will no longer be able to get at files and documents shared with you, so between now and mid-October, you’ll want to move those files to your own OneDrive.

As Engadget notes, Microsoft had already instituted limits on OneDrive Groups—you can only work with existing Groups, and you can’t create new ones or add people to your Groups—but Microsoft’s shutdown announcement marks the official death knell for the service.

If you use Office 365 Groups, you won’t be affected—that feature will live on. But if you rely on OneDrive Groups, similar services from other companies might be worth trying, such as Dropbox’s shared folders feature and Google Drive’s shared documents feature. If you rely on OneDrive Groups, take a look around at your other options and give them a try now, before OneDrive Groups go away for good.