disabling calendar and address book from mailboxes

Hi preuley30 ,

Please try the below commands which will help you to resolve your issues.

This command will hide your mailbox from the address book
Set-Mailbox -Identity "support@" -HiddenFromAddressListsEnabled $true

Get the list of users who are having permission on the calendar

Get-MailboxFolderPermission -Identity support@:\Calendar 

Set Default User Access Rights to NONE 

Set-MailboxFolderPermission -Identity support@:\Calendar -User Default -AccessRights {None}

if you want to revoke the calendar permission from a specific user then run the below command.

Set-MailboxFolderPermission -Identity support@:\Calendar -User username -AccessRights {None}

If your mailbox is not delegated to anyone then you can disable mailbox permission as well

Remove-MailboxPermission -Identity "support@" -AccessRights FullAccess -confirm:$False

I hope this is informative.

Thank you,

Regards,

MD