Confluence appears to greatly limit the type of URL links that can be specified, stripping them if they do not conform to http: protocol specifiers. It sometimes allows those of type file:, but its quite unpredictable whether or not it will accept those links.
We need our Confluence pages to use a broader range of protocol URLs, including those that invoke applications such as those that use the onenote: protocol to invoke Microsoft One Note. We also need to be able to address volume IDs in the file: protocol (e.g., file://E:\Mypath).
Is there a way we can bypass Confluence's checks in order to specify whatever URL we need to?