Quickly remove all the activity history from a Microsoft Account.

clean-microsoft-history.js

// Go to https://account.microsoft.com/privacy/activity-history
// Select "All activities" on the left panel.
// Open your browser's dev tools (F12), got to the console tab.
// Paste this script, it will load all the history elements and delete all activity.

// If you get spammed by errors in the console, turn your adblocker off temporarily.

// You will probably need to refresh the page and execute this script multiple times :
// The page is (IMHO) intentionnaly buggy to prevent people from deleting their data.
// Eventually everything will be clean.

// Updated and working on 03/03/2019

(async () => {
  const timeout = ms => new Promise(res => setTimeout(res, ms))

  const canLoadMore = () => document.querySelector('.timeline-load-more a') !== undefined

  const loadMore = async () => {
    const linkLoadMore = document.querySelector('.timeline-load-more a')
    linkLoadMore.click()
    console.log('Clicked load more.')
    await timeout(3000)
  }

  const deleteHistory = async () => {
    const historyEle = Array.from(document.querySelectorAll('.delete-button'))
    for (aHistoryEle of historyEle) {
      await timeout(500)
      aHistoryEle.click()
      console.log('Clicked delete on a history element.')
    }
  }

  // We loop 5 times because the "Load more" is cyclic.
  // You see content of the start when you reach the end.
  const loop = async () => {
    for (let i = 0 ; i < 5 && canLoadMore() ; i++)
      await loadMore()
    await deleteHistory()
    console.log('Did a cycle.')
  }

  // Delete the history
  while (canLoadMore()) await loop()
   
  console.log('Finished cleaning history.')
})()