As others have said Bungie doesn't support game sharing nor do they troubleshoot it.
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read every other reply, the game shows up as owned on the launcher but not owned in game, If you gameshare (for any game) AT ALL on the microsoft store you cant even purchase the dlcs. at the very least that is an oversight on bungies end
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I have read all the replies. However it still doesn't change Bungie stance on them not supporting or troubleshooting gamesharing.