Trusted Contact Feature - If I die
If you're a heavy Microsoft user then most of your data is likely to be on a Windows machine somewhere, which you can pass on the login credentials for if you wish. OneDrive is growing in importance though, and if there are files that are only in OneDrive then it's not easy for someone else to gain access (for obvious security reasons).
We asked the OneDrive team about it and they said if there was enough user demand for a 'trusted contact' feature (via the UserVoice site) then they'd certainly consider adding it. For Outlook.com, meanwhile, Microsoft will ship you a DVD of emails and attachments if you can prove you're the next of kin and you need something that's in there.
Info pulled from: How to leave all your accounts to someone else when you...
Lorraine Krugel commented
Just doing my will, and I would love it if I passed away that my brother, who will be the guardian of my son, will be able to share with my son all the videos and pictures stored in my OneDrive of me, my husband and of him growing up...