@Override
  public Element handle(Element request, Map<String, Object> context) throws ServiceException {
    ZimbraSoapContext zsc = getZimbraSoapContext(context);

    Element mreq = request.getElement(AdminConstants.E_MAILBOX);
    String accountId = mreq.getAttribute(AdminConstants.A_ACCOUNTID);

    Provisioning prov = Provisioning.getInstance();
    Account account = prov.get(AccountBy.id, accountId, zsc.getAuthToken());
    if (account == null) {
      throw AccountServiceException.NO_SUCH_ACCOUNT(accountId);
    }
    checkAdminLoginAsRight(zsc, prov, account);

    Mailbox mbox = MailboxManager.getInstance().getMailboxByAccount(account, false);
    if (mbox == null) {
      throw MailServiceException.NO_SUCH_MBOX(accountId);
    }

    mbox.recalculateFolderAndTagCounts();

    Element response = zsc.createElement(AdminConstants.RECALCULATE_MAILBOX_COUNTS_RESPONSE);
    response
        .addElement(AdminConstants.E_MAILBOX)
        .addAttribute(AdminConstants.A_ACCOUNTID, accountId)
        .addAttribute(AdminConstants.A_QUOTA_USED, mbox.getSize());
    return response;
  }