[Supplement 23.11.2020] This is a post to a blog post from 11/16/20. Please read here first Documentation The Microsoft documentation on Group Policy "Exclude certain file types from uploading" is partly incorrect and incomplete. Incorrect: The registry key is incorrect Missing information: currently no Office formats are supported. I have only tested this with docx, xlsx and pptx.  Microsoft has informed me that the documentation will be adapted. In the wildcard description only the asterisk [*] is described. But also the question mark [?] works. Examples: In the group policy are stored: Files Synchronization Try.* Tryt Blocked   Try.mdb Blocked … OneDrive | Update: Exclude specific kinds of files from being uploaded weiterlesen