Kent
it seems from reports of many users that it's a mixed bag. I have several Macbookpros running Mojave and only one doesn't work with MAU - the others do. Nothing remarkable is different.
Other user reports mixed results as well.
After looking at this for a year, it appears it is MAC OS independent and hardware independent.
Some people have cured it by doing the Key Chain Certificate fix and apparently some have fixed it by stopping the StandAloneUpdaterDaemon process.
So it appears this shows up as a symptoms from various causes.
I worked with MS Support for an afternoon where they took control of my Mac and tried a bunch of stuff and nothing worked. I complete re-installed MACOS Mojave and that was no help. I also completely scrubbed every MS file and
re-installed from scratch and no help.