Click Start, point to All Programs, point to Administrative Tools, and then click SharePoint Central Administration.
In the Virtual Server Configuration section, click Configure virtual server settings.
On the Virtual Server List page, click the name of the virtual server you want to configure.
On the Virtual Server Settings page, under Virtual Server Management, click Virtual server general settings.
In the Default Time Zone section, select the time zone to use for all sites and subsites under the virtual server.
In the Default Quota Template section, select the quota template to use as a default for sites.
If there are no quota templates, you can create a template by using the Manage Quota Templates page. Note that when you specify a default template for the virtual server, you can still select a different template when you create a site.
In the Person Name Smart Tag and Presence Settings section, select Yes or No next to Enable Person Name Smart Tag and Online Status for Members to show that information for all sites under the virtual server.
In the Maximum Upload Size section, type the maximum file size to allow.
In the Alerts section, specify settings for alerts:
Select On or Off to allow or disallow alerts for all sites under this virtual server.
If you choose to allow alerts, and want to limit the number of alerts that users can create, enter a value under Maximum number of alerts that a user can create. To allow an unlimited number of alerts, select Unlimited number.
In the Web Page Security Validation section, specify the following settings:
Select On or Off to allow or disallow Web page security validation.
To set the expiration time, select After, and then type the length of time to wait before the security validations expire, or select Never to keep the validations from expiring.
In the Send User Name and Password in E-Mail section, select Yes or No to allow or disallow this option.
In the E-Mail Enabled Document Libraries section, specify the option to allow attachments to be inserted:
Select Yes or No to allow or disallow e-mail attachments.
In the Public folder server and root path box, type the name of the computer running Microsoft Exchange Server and the path to the root folder for Exchange Server public folders on that server.
If you choose to allow e-mail attachments, specify the frequency and times to check for e-mail attachments in the public folder.
In the Event Handlers section, select On or Off to allow or disallow event handlers. When this feature is enabled, you can write code to handle events, and then specify the code to use for a particular document library in the document library settings.
