Where Does Microsoft To Do Store Tasks?
Microsoft To Do syncs tasks through Exchange Online, with per OS app caches holding offline copies.
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Microsoft To Do stores tasks in Exchange Online under your Microsoft account, shared with Outlook Tasks and Planner data. Every platform client (Windows, Android, iPhone, web) renders the same cloud lists. Local apps keep offline caches that refill on sign in.
That makes backup a cloud question. Export lists from To Do or Outlook on the web for portable copies; cache folders are not archives. Switching accounts or tenants orphans lists, so migrate important ones before leaving school or work accounts.
Where Microsoft To Do stores this, by platform
Exchange Online cloud (local cache in app data)
Exact cache paths may vary by Store versus installer builds. Export lists from the app or Outlook web for real backups.
Exchange Online cloud (offline cache in app storage)
Widgets read the same cloud lists. Clearing app data only drops the cache; tasks return on next sync.
Exchange Online cloud (offline cache in app storage)
Same model as Android. Shared lists follow Microsoft family or 365 sharing, not device transfers.
Frequently asked questions
How do I back up Microsoft To Do lists?
Export from To Do or Outlook on the web to files you keep. Cache copies on devices are sync artifacts, not restorable backups.
Why did tasks vanish after changing accounts?
Lists belong to the signed in Exchange mailbox. Sign back into the old account or check Outlook Tasks there; nothing transferred to the new one automatically.
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