Can't find a file you created? If you were working on a different computer and saved the file into a folder outside of your OneDrive the file may still only be available on that computer. Files saved to a Windows Desktop, Documents, or Pictures folder will not save into your OneDrive unless you have enabled Known Folder Move (KFM) on that computer.
Enabling KFM backs up Windows Desktop, Documents, and Pictures folders to your OneDrive so files you saved to these folders will still be available from your OneDrive - wherever you sign in.
See how to easily enable KFM.