- If the system invites 10,000 users to enroll on a single
- 5,000 of them might try to sign in at the same time.
- 500 of them might call the help desk for assistance.
- The help desk will have a record call volume!
- To avoid this:
- Limit the invitations sent per day (e.g., 500).
- Limit the frequency of invitations per user (e.g., weekly).
- Avoid sending invitations on weekends and holidays.