I want to create a Foundry mission that begins at Bajor. I even made a map for it because none already exist. However in the Beta Ursae Sector Block list, Bajor is missing as a doorway to begin your mission.

Does anyone know - Is there a reason for this?

Haw' Jimmy, how's it up north the day?

There are a few doors missing from the foundry in it's current form. You'll find that there's also a few threads on this forum pondering certain planets and systems missing doors.

I don't think cryptic would go as far as to discourage authors from having their missions take place in locations that are really well known or frequently shown in the shows. So I guess they've just been missed out in the same way that certain ships and costume options are missing seemingly at random. We can only hope this stuff gets fixed along with S4 update in July.

Och' aye, I thought as much. So long as I'm not missing something.

Hopefully it will get addressed soon.

If I had to guess, randomly and without any insight, I might say that since Bajor inherently has DS9 any instance with it would automatically involve DS9 and would run very close to being afoul of the established IP rules.

You aren't allowed to use any established canon characters or ships in your missions if you read the big EULA for the Foundry, so DS9 might actually fall under this category. If the ds9 model is available, that is another thing, because technically it is just a Cardasian space station, so there might be dozens of them around the galaxy.

Quote from wishstone here
Deep Space Nine; Enterprise; Voyager; fictional planets such as Bajor, Vulcan, or Qo'noS , and these other properties exist as prior art and thus as such the use of them by authors constitutes a violation of the terms of EULA for the foundry. Thus the lack of mission doors at Bajor is understandable. Your best suggestion for foundry missions are to use items, persons, places, and things which exist within the STO universe but were not explicitly placed within previously occurring Star Trek.

I just checked the EULA - this is not true.

Relevant sections quoted, commentary in red.

Absolutely nowhere in the EULA does it say anything about not using canon locations. In fact it's fairly explicit that you can, since they say "Use anything in canon except..." and canon locations do not fall on the exception list in any way shape or form.

my guess would be that there isn't a mission door on bajor because it is in such close proximity to DS9, that the Devs assumed you could just use one of the doors on DS9, no EULA violations here.