You can perform manual scans when you want to scan messages for specific purposes. For example, you can create a content filtering rule to detect a particular category of subject-line violations that are associated with a new threat, and then run the scan immediately.
To perform a manual scan, do the following:
Configure the manual scan parameters.
You can configure basic scanning options and specify the mailboxes and public folders that you want to scan. You can also enable content filtering scanning and enable the content filtering rules that you want to apply to the scan.
Ensure that the public folders that you want to scan have owners assigned to them. Mail Security does not perform a manual scan on the public folders that do not have owners assigned to them.
Run the manual scan.
Before you run the manual scan, ensure that you create a custom throttling policy and assign it to the Symantec Mail Security for Microsoft Exchange service account user.
View the manual scan results.
You can stop running a manual scan at any time.