Change Office 365 resource calendar default permitions

If you want to set that everyone can see who booked the resource - you must change default permissions on resource calendar.
Connect Exchange Online with PowerShell.

See permissions on resource calendar:
Get-MailboxFolderPermission -Identity resource@mail.com:\Calendar

FolderName  User       AccessRights
----------  ----       ------------
Calendar    Default    {AvailabilityOnly}
Calendar    Anonymous  {None}

Set permissions on resource calendar:
Set-MailboxFolderPermission -Identity resource@mail.com:\Calendar -User Default -AccessRights Reviewer

FolderName User     AccessRights
---------- ----     ------------
Calendar   Default  {Reviewer}
Calendar   Anonymous {None}

Resource: exchangeserverpro.com