The recently launched custom ID field is great, but having tried it out, it appears it is currently not possible to start the number sequence of an ID field from a particular number.
For example, it would be great to be able to set a number sequence to start from 1000 instead of 1, or for users that are migrating into Asana, they could seamlessly continue their IDs in Asana from a particular ‘ticket’ number from their previous source of truth.
Hoping this will be added as a quick follow-up, soon! 