# Update Items in Exchange

The connector's `update` fetch action updates the metadata of items in the Exchange repository.

You can update the Access Control List (ACL) for a folder. This means that you can grant a user permissions on a folder or remove permissions.

To use the `update` action, you must construct some XML that specifies the identifiers of the items to update and provides the new metadata. You must add the XML to the action as the value of the `identifiersXML` action parameter. The XML must be URL-encoded before being used in the action command. For example:

    http://host:port/action=Fetch&FetchAction=update
                                 &IdentifiersXML=URL-encoded XML

For more information about how to construct the XML, see Construct XML to Update Access Control Lists.

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