When you run Export-AutoDiscoverConfig cmdlet, the enterprise administrator password is sent through the network in clear text format. This problem occurs in Microsoft Exchange Server 2019 and 2016.
Additionally, if the target domain controller requires signing, the cmdlet generates the following error message:
A more secure authentication method is required for this server.
This issue occurs because authentication involves a simple bind process to make the LDAP connection.
To fix this issue, install one of the following updates:
Learn about the terminology that Microsoft uses to describe software updates.