To disable access to a Zimlet, you can remove Zimlets from the available list by COS or by Account. This does not remove the Zimlet from Zimbra server.
Select the COS and click Edit.
Go to the COS Zimlets tab, select the Zimlets to remove from the Available Zimlets column and click Remove.
Save your changes.
Select the account and click Edit.
Go to the Zimlets tab, select the Zimlets to remove from the Available Zimlets column and click Remove.
Save your changes.