Issues in Exchange or Teams when you try to delegate information

Symptoms 

When you try to delete the free/busy configuration on a mailbox, you can't add or re-create any necessary delegate permissions.

Causes 

The ResetDelegateUserCollection parameter of the Remove-MailboxFolderPermission cmdlet doesn't exist in Microsoft Exchange Server 2019. 

Resolution

To fix this issue, install the following cumulative update: 

Cumulative Update 14 for Exchange Server 2019 or a later cumulative update for Exchange Server 2019