Exchange must have the most current, approved service pack installed.

Failure to install the most current Exchange service pack leaves a system vulnerable to exploitation. Current service packs correct known security and system vulnerabilities.

Determine the most current, approved service pack.

Open the Exchange Management Shell and enter the following command:

Get-ExchangeServer | fl Name, AdminDisplayVersion

If the value of "AdminDisplayVersion" does not return the most current, approved service pack, this is a finding.

Install the most current, approved service pack.