Need to give some admin or management users access to calenders in other mailboxes? Follow these easy steps:

  1. Establish a powershell connection to Office 365
  2. Run the following command:

    3. Add-MailboxFolderPermission –Identity user_to_access@crestlline.net:\Calendar -AccessRights Reviewer -User user_getting_access@crestline.net

That’s it!