Database availability group server cannot be removed from database

I was decommissioning the old Exchange 2013 environment with Database Availability Group.

I got an error when removing the Exchange servers from the DAG: 

Error: “Database availability group server EXCHANGESERVER cannot be removed from database availability group DAG since it is currently set for datacenter activation mode and it requires at least two mailbox servers.”

I tried again in PowerShell

Remove-DatabaseAvailabilityGroupServer -Identity <DAGName> 

-MailboxServer <ExchangeServer>

Помилка при видаленні Exchange сервера з Database Availability Group

Виводив з експлуатації старе середовище Exchange 2013 з багатьма Database Availability Group.

Отримав повідомлення про помилку під час видалення Exchange серверів з DAG:

Error: “Database availability group server EXCHANGESERVER cannot be removed from database availability group DAG since it is currently set for datacenter activation mode and it requires at least two mailbox servers.”

Я спробував ще раз у PowerShell

[PS]Remove-DatabaseAvailabilityGroupServer -Identity <DAGName> 

-MailboxServer <ExchangeServer>