The Guest Username Policy Configuration page allows the Cisco ISE administrator to specify how the user names will be created for the guest accounts.
Username policy configuration can be done in two ways:
• General
• Random
Configuring General Guest Username Policy
You can create a guest username based on the e-mail address or the first and last name of the guest.
To configure general guest username policy, complete the following steps:
Step 1: Choose Administration > Web Portal Management > Settings > Guest > Username Policy
Step 2: Choose one of the username policy options for creating the username for the guest account:
c. Create username from email address—Select this option if you want the guest username to be formed from the
guest’s e-mail address.
d. Create username from the first name and last name —Select this option if you want the guest username to be
formed from the first initial of the first name combined with the last name of the guest user.
Step 3: Enter the Minimum Username length for the guest usernames. The valid range is 1-20.
If the guest usernames formed by the e-mail address or by the combination of first and last name are shorter than the minimum length, the username will be appended with 0(zero) characters and a 1 at the end. If the username is not unique, numeric characters are appended to the name to make it unique.
Please check the below link for more configuration:
http://www.cisco.com/en/US/docs/security/ise/1.1.1/user_guide/ise_guest_pol.pdf
