Rated 1 out of 5 stars

After the last update, OWL has been causing difficulty because it "hides" W365 emails with a "read" status: T'bird 128.9.1esr (64-bit) My non-OWL/W365 emails remain visible after viewing. I can now find "read" emails only by using the T'bird Search tool. If I turn on Thunderbird Troubleshoot mode, I can't see my email in 2 different W365 accounts. I hope you can find a fix for this!

We are not able to reproduce this issue. Owl is not involved in the *display* of emails, at all. This is entirely the Thunderbird UI. If you can see the emails during search, that means that you probably did something to filter or hide the messages and are not aware of it. Maybe you have a filter active. In any case, Owl is not at all involved in that. Owl only provides the emails to Thunderbird.

If you enable Troubleshooting mode, Thunderbird disables all addons, including Owl, so of course your Owl account cannot work. That is normal.