Convert Exchange Online / Office 365 Mailbox from AD Sync to Cloud Only

article #1368, updated 1061 days ago

In administrative Powershell:

  1. Install-Module AzureAD
  2. Install-Module MSOnline
  3. Connect-AzureAD
  4. Connect-MsolService

In Active Directory Users and Computers, remove the user object from OU being AD-synched. Then complete an Azure/AD sync cycle. Then:

  1. Restore-MsolUser -UserPrincipalName users_login_probably_email
  2. Set-MsolUser -UserPrincipalName users_login_probably_email -ImmutableId "$null"

Do the last step before the next automatic AD sync!