Zimbra Collaboration Suite 7.0
Zimbra Collaboration Suite 7.0
Administrator's Guide
Open Source Edition

Customizing Accounts, Setting General Preferences and Password Rules > Setting Password Policy

Setting Password Policy
If internal authentication is configured for the domain, you can configure ZCS to require users to create strong passwords.
Important: If Microsoft Active Directory (AD) is used for user authentication, you must disable the Change Password feature in their COS. The AD password policy is not managed by Zimbra.
The password settings that can be configured are listed below.
COS/Account Tabs
Minimum/Maximum password length
This specifies the required length of a password. The default minimum length is 6 characters. The default maximum length is 64 characters.
Minimum /Maximum password age
Configuring a minimum and maximum password age sets the password expiration date. Users can change their passwords at any time between the minimum and maximum set. They must change it when the maximum password age is reached.
Minimum upper case characters
Minimum lower case characters
Minimum punctuation symbols
Minimum number of unique passwords history
Number of unique new passwords that a user must create before he can reuse an old password.
Users cannot change their passwords.This should be set if authentication is external.
Must change password
When a user logs in, he is required to change his password.
General Information
When this is enabled, users can change their password at any time within the password age settings from their account Preferences tab.