Names are limited to 20 characters, must include at least one letter, and may include alphanumeric characters, spaces, $, _ and -.
If you are attempting to add domain users and you cannot select the domain, you are not logged on to the domain. Log off the workstation and log back on, making sure you log on to the domain, not the local computer.
Windows Account Policies determine password characteristics like expiration time, length, and so forth. They are not set from within the DeltaV User Manager.
In a workgroup environment, each user must have a Windows and DeltaV database account with the same user name and password on every workstation in the DeltaV workgroup where that user needs to log into. Creating a user account in DeltaV User Manager creates the DeltaV database account on all workstations in the workgroup but creates a Windows account only on the local workstation. To create the Windows account on other workstations in the DeltaV workgroup system, select File → Replicate Account and select the pertinent workstations (where that user would need to log into). Using the DeltaV Explorer, download all the workstations available to that user.