Hi eoutboard,

That's a frustrating issue to encounter during your testing phase! The fact that most forums are showing up in the dropdown but one specific forum is missing suggests there might be a permission or visibility setting applied to that particular forum rather than a system-wide configuration problem.

Here are some steps to troubleshoot this issue:

1. Check the forum's visibility settings - Navigate to the forum settings for the forum you're trying to move the topic to, and verify that it's set to be visible to your user role and that it's not hidden or restricted in any way
2. Review user permissions - Ensure your account has the appropriate permissions to move topics into that specific forum. Sometimes forums have restricted move permissions that differ from general access permissions
3. Verify the forum isn't in a special state - Check if the forum might be archived, locked, or in a category that has different permissions than the others
4. Test with a different forum first - Try moving your test topic to one of the forums that IS showing in the dropdown to confirm the move functionality itself is working properly
5. Check forum category settings - If forums are organized into categories, verify that the missing forum's category doesn't have any restrictions on receiving moved topics

You mentioned finding an old post from 2020 about "allow topics to move" settings - while you may not see that exact setting currently, it's worth checking if there are any forum-level or category-level restrictions that might have evolved in more recent versions. Can you tell me which forum is missing from the dropdown, and whether it's in a different category than the forums that are showing up? That might help narrow down whether it's a category-level permission issue.