Okay, lemme see if I can help explain things a bit...
PhilW, what Access is doing with your query is to first locate all of the groups of data that actually exist in your data, then count them. So if there are no records with status="A" in your selection, even if "A" is a possible value, there will be no results for "A." The group does not exist.
What Howey is suggesting is what's called an outer join. Phil, take your query-window and click directly upon the line that connects any two boxes (in a multi-table query). This line can be a straight-line or it can contain an arrowhead. Fiddle with it; try it. Read the MS help on "left join," "right join," and so-forth; so-called "outer" (vs. "inner," of course) joins.
Getting rid of the "here-a-join, there-a-join, everywhere-a-join-join" doubletalk ... here's English...
First, build a table with all the possible values for "status." It's just one table with A, B, C, and so-on; one per row.
Now, we take your original count-query ... the one you did that groups-by status and counts the number of occurrences ... your original output that didn't contain anything for "A," and we right join that with this table of statuses, joining the two tables on "status."
If you ran such a query with an ordinary join, the output would not be different. But if we click on that line, make it an arrow (the dialog-box is pretty self-explanatory), we tell Access that we want to see a row in the result for every value in the STATUS table, whether or not there is a matching row for it in the COUNTS table/query.
(No, I realize that what I'm describing doesn't quite match what you want... and that I'm using database-jargon after all... but just think about the concept.) This new table provides Access, in effect, with a list of all the possible values that could occur, and by using an outer join, we'll get results for each entry, each possibility listed, whether or not it has results.
You'll get nulls in the non-matching columns, but that's what the NZ() ("null-to-zero") function is good for.
Do a Google search (advanced search) on the exact-phrase outer join. Read until *pop! the little light-bulb blinks on. Say, "ahhhh... hah!"