Rule ID
SV-259596r961152_rule
Version
V2R2
CCIs
To ensure hostile insiders are unable to easily commit DoS attacks and reduce the effectiveness of mail flow throughout the environment, a second Edge server is deployed to allow for multiple paths of mail flow both internally and externally into the environment. This prevents a single point-of-failure and allows for service to continue in the event of a DoS attack targeting one Edge role.
Review the EDSP for current configuration. On the mailbox server, open a PowerShell prompt and run the following command: Get-EdgeSubscription If there is only one subscription on each server, this is a finding.
At a minimum, a second server must be deployed and subscribed to.