Delete all Microsoft 365 groups

Author: Laura Kokkarinen

There are so many different ways to create Microsoft 365 groups. Teams, Planner, SharePoint team sites, etc. — you can accumulate a lot of them very fast. Use this script below to delete the ones you no longer need.

PowerShell

$sparksjoy = "All Company", "TEMPLATE Project", "We have cats in this team! Join!"
$groups = m365 aad m365group list -o json | ConvertFrom-Json
$groups = $groups | where {-not ($sparksjoy -contains $_.displayName)}
if ($groups.Count -eq 0) { break }
$groups | Format-Table displayName
Write-Host "Total:" $groups.Count
Read-Host -Prompt "Press Enter to start deleting (CTRL + C to exit)"
$progress = 0
$total = $groups.Count
foreach ($group in $groups)
{
    $progress++
    Write-Host $progress / $total":" $group.displayName
    m365 aad m365group remove --id $group.id --force
}

Bash

#!/bin/bash

# requires jq: https://stedolan.github.io/jq/

sparksjoy=("All Company" "TEMPLATE Project" "We have cats in this team! Join!")
groupstoremove=()
while read m365group; do
  exists=false
  displayName=$(echo $m365group | cut -d';' -f 1)
  for keep in "${sparksjoy[@]}"; do
    if [ "$keep" == "$displayName" ] ; then
      exists=true
      break
    fi
  done
  if [ "$exists" = false ]; then
    groupstoremove+=("$m365group")
  fi
done < <(m365 aad m365group list -o json | jq -r '.[] | .displayName + ";" + .id')

if [ ${#groupstoremove[@]} = 0 ]; then
  exit 1
fi

printf '%s\n' "${groupstoremove[@]}"
echo "Press Enter to start deleting (CTRL + C to exit)"
read foo

for m365group in "${groupstoremove[@]}"; do
  displayName=$(echo $m365group | cut -d';' -f 1)
  id=$(echo $m365group | cut -d';' -f 2)
  echo "Deleting $displayName..."
  m365 aad m365group remove --id $id --force
done