Remove-MailContact -Identity “Mail Contact Display Name”
If you Do not want to get the confirmation for deletion type below command:
Remove-MailContact -Identity “Mail Contact Display Name” -Confirm:$False
Remove-MailContact -Identity “Mail Contact Display Name”
If you Do not want to get the confirmation for deletion type below command:
Remove-MailContact -Identity “Mail Contact Display Name” -Confirm:$False