Operation Arctic Endurance - military exercise in Greenland organized by Denmark. From what I can find online, which is very little, Denmark sent invitations to other countries to participate. We don't know if Canada was invited. What we do know from the article:
Canada’s Foreign Minister Anita Anand is set to open an official consulate in Nuuk, Greenland’s capital, in the coming weeks, and has expressed support for the island’s sovereignty in recent public statements and bilateral meetings.
Other countries know where we stand. Let's wait and see if we get invited.