On Office 365 ARM version (Windows 11), when I attempt to save a Word document or save a PDF version, nothing happens when I click the Save button in Backstage. My Dropbox folder and saving to "This PC" is my default location. If I switch to OneDrive, it saves. If I switch to Browse, the folder location that opens is AppData/Roaming/Microsoft/Windows/Network Shorcuts, but I can switch the desired folder and save the file. I see the same issue with Excel, but Excel notes "Save Failed" at the top.