Create Azure AD groups and add a given user

mkGroups.ps1

# This script requires :
#  1. the Azure AD Powershell module: Install-Module -Name AzureADPreview
#  2. an authenticated user: Connect-AzureAD

$uid = ""

$numberOfGroupsToCreate = 200;
for($i = 0; $i -lt $numberOfGroupsToCreate; $i++)
{
  $displayName = "GroupNamePrefix" + $i

  # create new group
  $output = New-AzureADGroup -DisplayName $displayName -MailEnabled $false -SecurityEnabled $true -MailNickName "NotSet"

  # get group id of new group
  $split = -split $output
  $oid = $split[5]

  # add user to group
  Add-AzureADGroupMember -ObjectId $oid -RefObjectId $uid
  
  Write-Output "successfully created group: $($displayName) with user $($uid)"
}