Zimbra Suite Plus/Zimbra Admin/Quota Management

Zimbra Admin Plus - Quota Management

Zimbra Admin Plus Quota Management

What is Quota Management

Zimbra Admin Plus allows the Global Administrator to set two different types of quota limits: the "Grant Limit" and the "Domain Quota".

Neither the "Domain Quota" nor the "Grant Limit" are mandatory, meaning that a Delegated Admin can be allowed to grant any quota to a user and that a domain can lack a maximum quota limit.

The "Grant Limit"

The "Grant Limit" is one of the properties of a Delegated Admin.

It specifies the maximum mailbox quota that such admin can grant to a mailbox and can be set and changed in the "Delegated Admins" section of the Zimbra Admin Plus tab of the Zimbra Admin Plusistration Zimlet.

Three options are available:

None: the Delegated Admin cannot edit the Quota attribute of a mailbox.
Custom: the Delegated Admin can grant up to the specified value. This overrides any domain/COS quota setting.
Unlimited: the Delegated Admin can grant any quota to the mailbox. This overrides any domain/COS quota setting.

The "Domain Quota"

The "Domain Quota" is a property that applies to a domain.

It specifies the maximum mailbox quota that any Administrator can grant to a mailbox in such domain and can be set and changed in the "Domains Settings" section of the Zimbra Admin Plus tab of the Zimbra Admin Plusistration Zimlet.

warning

Assigning an unlimited quota to a mailbox will override the Domain Quota setting.

"Grant Limit" vs "Domain Quota"

The "Grant Limit" and "Domain Quota" properties are mutually exclusive on a restrictive basis.

This means that the following scenarios may occour:

A Global Admin grants a user a higher quota than the allowed Domain Quota
A Delegated Admin grants a user a higher quota than the allowed Domain Quota
A Delegated Admin's Grant Limit is lower than the Domain Quota

Let's examine this scenario one by one.

A Global Admin grants a user a higher quota than the allowed Domain Quota

Since the Domain Quota applies to a given domain, not to a given Admin, the effective quota for the user will be the maximum quota allowed by the "Domain Quota" setting.

A Delegated Admin grants a user a higher quota than the allowed Domain Quota

In this case the effective quota for the user will be the maximum quota allowed by the "Domain Quota" setting, even if the Delegated Admin's Grant Limit is higher than the Domain Quota.

A Delegated Admin's Grant Limit is lower than the Domain Quota

In this case the maximum quota that the Delegated Admin can grant to a user will be the one defined by the Grant Limit, even if the Domain Quota is higher. A Global Admin, which is not bound to any Grant Limit restriction, will be allowed to assign any mailbox quota to the user up to the limit allowed by the Domain Quota.

Aug 25, 2016 - Know more »