Neos did away with support for the Word desktop app. For a while, we were still able to use it, but now it's gone completely.
This is problematic for power users and advanced Word functions due to the need to switch views when online and other limitations. An example, Neos' Knowledge Base provides an ALT+F9 option to enter Word Advanced coding - which does not work via a browser. The switching back and forth between desktop and online simply is not practical.
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There are also a lot of formatting issues that can only be properly edited on the desktop Word app, and the only way to do a final edit on a template and know how the spacing will turn out is on the desktop Word app.