ZCS Administrator's Guide 7.2.3
ZCS Administrator's Guide 7.2.3
Open Source Edition


Managing User Accounts > Managing Class of Services

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:
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ZCS features for accounts assigned the COS
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For more information about features, preferences, advanced functions, see Customizing Accounts, Setting General Preferences and Password Rules.
A default COS is automatically created during the installation of VMware Zimbra Collaboration Server. 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.
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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:
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Whether outgoing messages are saved to Sent can be changed from the Zimbra Web Client in the user’s Preferences.
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COS Calendar Preference to Set Default Time Zones
The default time zone setting that is displayed in the account’s Preferences folder is used to localize the time for received messages and calendar activities in the standard Web client. When using the standard Web client, the time zone on the computer is not used to set the time a message is received or for calendar activities. The time zone setting in the Preferences>General tab is. When using the advanced Web client, the time zone setting on the computer is used as the time stamp for received messages and for calendar activities, not the time zone setting on the General tab.
Because the advanced Web client and the standard Web client do not use the same time zone source to render messages, you may notice that the same message has a different time when displayed in one or the other client. You can avoid this by having the computer time zone and the Web client time zone set to the same time.
Distributing Accounts Across Servers
In an environment with multiple mailbox servers, the class of service is used to assign a new account to a mailbox server. The COS Server Pool tab lists the mailbox servers in your Zimbra environment. When you configure the COS, you select which servers to add to the server pool. Within each pool of servers, a random algorithm assigns new mailboxes to any available server.
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Changing Passwords
If you use internal authentication, you can quickly change an account's password from the Account’s toolbar. The user must be told the new password to log on.
If you want to make sure users change a password that you create, you can enable Must Change Password for the account. The user must change the password the next time he logs on.
Password restrictions can be set either at the COS level or at the account level. You can configure settings to require users to create strong passwords and change their passwords regularly, and you can set the parameters to lock out accounts when incorrect passwords are entered. See Setting Password Policy and Setting Failed Login Policy in the Managing End-User Mailbox Features chapter.
Directing Users to a Change Password Page When Using External Authentication
If your ZWC authentication is configured as external auth, you can configure ZCS to direct users to your password change page when users change their passwords. You can either set this URL as a global setting or a per domain setting.
Set the zimbraChangePasswordURL attribute to the URL of your password change page. The Change Password link in the Preferences>General tab goes to this URL and when passwords expire, users are sent to this page.
This is changed from the zmprov CLI.
 
Setting Polling Intervals
Polling intervals determine how often accounts poll the server for new data. Polling intervals can be set in the COS/account tab for POP, IMAP, Calendar updates, RSS feeds, and CalDAV invites.
If the polling interval is not set, data is not automatically polled.
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