Up to 90 email accounts were compromised during the cyber-attack on Parliament on Friday.
The House of Commons said that fewer than 1% of the 9,000 people who use its system were impacted by the hacking,
The hack prompted officials to disable remote access to the emails of MPs, peers and their staff as a safeguard.
Parliamentary authorities said hackers had mounted a “determined attack” on all user accounts “in an attempt to identify weak passwords”.
Source: world bbc