Zimbra Collaboration Suite 7.0

Administrator's Guide

Open Source Edition

Managing Class of Services

Class of Service (COS) determines what default attributes an account has and which features are enabled or denied. The following can be configured in a COS:

ZCS features for accounts assigned the COS

Default settings for user preferences

Themes that users can use in the Zimbra Web Client

Zimlets that users can use in the Zimbra Web Client

Servers that are added to the server pool to distribute accounts across

Advanced functions including setting rules for attachment blocking, account quotas, data source polling intervals, for proxy-allowed domains, and policies for passwords, login, timeout, email retention, and free/busy interop

Zimbra Mobile sync rules

For more information about features, preferences, advanced functions, see Chapter Chapter 9, Customizing Accounts, Setting General Preferences and Password Rules.

A default COS is automatically created during the installation of Zimbra Collaboration Suite. A COS is global and does not need to be restricted to a particular domain or set of domains. You can modify the default COS to set the attributes to your email restrictions, and you can create multiple COSs.

Each account is assigned one COS. You can create a domain COS and have all accounts created on that domain automatically be assigned this COS. You can create numerous COSs and specify which COS(s) are availably for a domain. If the domain does not have a COS defined, the original default COS is automatically assigned when an account is created.

Note:

If you delete a COS that accounts are currently assigned, the accounts are automatically assigned the default COS.

Assigning a COS to an account quickly configures account features and restrictions. Some of the COS settings can be overridden either by global settings or by user settings. For example:

Whether outgoing messages are saved to Sent can be changed from the Zimbra Web Client in the user’s Preferences.

Attachment blocking set as a global setting can override the COS setting.

Note:

Some COS settings assigned to an account are not enforced for IMAP clients.