Question

I'm trying to use Links synchronizer (Import) with link type X but the issues are not added to the structure.

Answer

Unless Exclusive Mode option is not turned on, Links synchronizer does not add issues to the structure.

If you'd like to add all issues that have a link of type X to the structure, run Import with Exclusive Mode turned on.

Note that if you install a synchronizer (rather than run an Import) with Exclusive Mode flag, it will continuously work both ways - removing issues from the structure will cause links to be removed. If you run a Resync and choose direction from Structure to Links, then all links of type X between issues that are not in the structure (but from projects enabled for Structure) will be deleted. If you Resync an empty structure to links with Exclusive Mode on, you'll effectively remove all links of that type.

If you'd like to add some of the linked issues to the structure, you need to first add them via Search or Saved Filter Synchronizer, and then run Import without Exclusive Mode flag, or install and resync a synchronizer.