Office documents open read-only in SharePoint

Because there are many questions about this behavior, I want to blog about it.

You might have noticed, that if you simply click on a document, it will be opened in read-only mode. You have to use the dropdown and select “Edit in …” to open it with read-write access.

There is a Knowledgebase article available, which describes the problem and offers a solution:

To change the default behavior, you’ll have to change the registry on each client!