@JustinMicheal-7973
You can use command below to check it directly:
Get-Mailbox -ResultSize unlimited | where{$_.InPlaceHolds -ne $null}
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.