Outlook calendar ORGANISATION LEVEL visibility setting.

Question

How to change Outlook calendar ORGANISATION LEVEL visibility setting from default free / busy, to default show meeting titles and locations for all users.

Please note: This is for internal users - Internal o365 Domain.

Answer 1

You cannot, there is no org-level setting to control this. You can set it in bulk for each mailbox, and run the script periodically for any newly created mailboxes:

$calendars = Get-Mailbox -RecipientTypeDetails UserMailbox | Get-MailboxFolderStatistics -FolderScope Calendar | ? {$_.FolderType -eq "Calendar"} | select @{n="Identity"; e={$_.Identity.ToString().Replace("\",":\")}}
$calendars | % {Set-MailboxFolderPermission -Identity $_.Identity -User Default -AccessRights LimitedDetails}