Keeper's Cloud architecture is Zero Knowledge (more information about our security model is here).
For security reasons, Keeper's Enterprise tenants are restricted to inviting and creating end-user accounts within certain email domains. When you sign up for a Keeper Business or Enterprise account, you are required to use a business email domain, e.g. mycompany.com.
If you sign up for the Enterprise account using @mycompany.com for your email address, this domain will be reserved to your tenant.
Keeper's architecture requires a domain to be reserved before it can be used by the Enterprise. This serves several purposes:
Ensures that end-users cannot create "rogue" accounts without being explicitly invited or provisioned by the Enterprise Admin.
Reduces administrative burden in locating free or personal accounts associated with a domain
Prevents a malicious user from creating a Keeper account with a domain reserved by an Enterprise customer.
If you require additional email domains (e.g. us.company1.com and eu.company2.com), please open a support ticket with the Keeper team and we will assist you in reserving the domain.
Keeper maintains a list of "personal" domains, for example gmail.com and yahoo.com which cannot be reserved and allow the general public to create Keeper accounts with those domains, with a verified email.
If you would like to allow end-users to create personal or Enterprise accounts with your reserved domain outside of your enterprise tenant, please contact the Keeper support team and we can unlock this domain for you.