Lots of talking, probably. They probably spilled everything about their histories, and not just their personal histories, but the histories of their own universes. Thinking about that makes the ending all the more heartbreaking.
Thanks for providing the "easy" version of the link that lets me subscribe without having to paste it into my instance search field! It's super convenient.
While responding to a distress call from a missing shuttlecraft and finding nothing where the shuttle should have been, the Enterprise-E flew too close to a spatial anomaly and it got trapped in a Sierpiński tetrix of folded fractal space, which caused the E to begin shrinking in size, along with everyone on it. Reversing out of the anomaly would have caused the warp core to lose coherence and destroy the ship, so it was abandoned before everyone on it was reduced to miniature.
It's still intact and apparently fully functional but is now the size of a micromachine and resides in the office of the head of the Daystrom Institute, who enjoys using it to pester his subordinates.
The missing shuttlecraft was eventually located within the anomaly, and its crew is fine, but Starfleet's best scientists have been unable to restore them to normal size. Fortunately for them, the replicators on the tiny shuttle remain functional, so supplying the miniaturized crewmen with food and other vital supplies has not been a problem. The last time Worf heard from them, they were being recruited by Section 31.
It's canon until it's not (ie, explicitly contradicted by some other Trek installment). And even then, canon in fiction is rather a silly concept anyway, and is largely more up to the collective opinion of the fan base than whatever big corporations owns the rights to it.
That is a fundamental misunderstanding of how transporters function in the Trek universe. There is no destruction, duplication, and recreation of objects. Matter is simply converted into quantum information and then converted back.
Lots of talking, probably. They probably spilled everything about their histories, and not just their personal histories, but the histories of their own universes. Thinking about that makes the ending all the more heartbreaking.