1. Log in to the Symantec Endpoint Protection Manager
2. Click on the Admin tab
3. Click on Servers
4. Right-click on Local Site and choose Edit Properties
5. Click on the Database tab
6. Edit the retention settings here as desired
7. Click OK

Disk Space Management procedures for the Symantec Endpoint Protection Manager

http://www.symantec.com/business/support/index?page=content&id=TECH96214

Customizing log management settings for remote clients

http://www.symantec.com/business/support/index?page=content&id=HOWTO55334

https://www-secure.symantec.com/connect/forums/how-make-sure-sepm-log-saved-least-12-months

Thanks....

Don't forget to mark your thread as 'SOLVED' with the answer that best helped you

Parks1

set the log retnetion - Comment:14 Oct 2012 : Link

Find the attach link

http://www.symantec.com/business/support/index?page=content&id=TECH104430

Find the Miscellaneous: Notifications Tab

Miscellaneous

Miscellaneous: Notifications

You can configure notifications to appear on client computers when virus definitions are out-of-date or missing. You can also determine the URL and text to include in the error messages that appear on client computers.

Table: General notification options

Option	Description
Display warning when definitions are outdated	Displays a message on client computers when definitions are out-of-date You can specify the number of days. The notification message appears when definitions are out of date by more than the specified number of days.
Display warning when Symantec Endpoint Protection is running without virus definitions	Displays a message on client computers when the Symantec Endpoint Protection client is running without definitions You can specify the number of attempts to update definitions, and then customize the warning message that appears on the client computer.
Display error messages with a URL to a solution	Enables or disables the error messages that appear on client computers and in the System log The error messages appear when users encounter the errors that are related to the system, licensing, installation, and Antivirus and Antispyware Protection. In client control mode, error messages do not appear. You can include the following types of URLs (uniform resource locations) in the error messages: · Display the URL to a Symantec Technical Support Knowledge Base article Displays a link to redirect users to a Knowledge Base article about a specific error that users see. If an article does not exist, a prompt appears enabling users to send an email message to online technical support or phone support. · Display a custom URL Displays a link to a customized Web site with alternative text and support information for the specific error that users see.
Custom Error Message	Opens a dialog box in which you can edit the default error message that appears on client computers and in the System log