Domain Security
Use the Domain Security page to set up an allowed or blocked list of domains that can be used in users' email addresses. Users who are added to the system and each time a user signs on, this security check is made. If you make changes to this list, you may cause current users to be locked out of the system.
Note:
Information is cached for twenty minutes. Users with the Infor-SystemAdministrator or IFSApplicationAdmin roles are exempt from this restriction. Even if the domain is blocked, they can still log into the tenants.