Question:

Vault users may receive unexpected emails with content that: We received a request to retrieve the user names for Veeva Vault accounts associated with this email address. If you did not initiate this request, please inform your Vault administrator.

Answer:

This is due to someone tries to retrieve the username on Vault's login page by using the e-mail address.

Related Documentation:

Article: How to Retrieve Login Usernames in PromoMats?