user powershell
run this commands:
Set-CalendarProcessing -AutomateProcessing AutoAccept name_of_equipment
Set-MailboxFolderPermission -Identity name_of_equipment:\calendar -User default -AccessRights LimitedDetails
user powershell
run this commands:
Set-CalendarProcessing -AutomateProcessing AutoAccept name_of_equipment
Set-MailboxFolderPermission -Identity name_of_equipment:\calendar -User default -AccessRights LimitedDetails
Yes No