Currently, the Flow email Item to copy an Attachment to OneDrive can only read a single or specific folder. Most choose Inbox. A lot of Users have Rules defined that move Email to other Folders and the Flow is not triggered before the Rule is invoked. The current solution is to replicate the flow for each Folder, which I feel is counterproductive in the automated world that we live. Recommendation: for Microsoft to enhance the Flow Email Item to be able to read multiple Folders and/or give the User the option to included all Subfolders.