Issue
If, after installing the Citrix License server software, the domain membership or server name of the license server changes the administrator will be locked out of the License Management Console.
Background
By default, the account used during the installation process is the only account with the ability to logon to the License Management Console. If the domain membership or server name changes the License Management Console does not automatically update the credentials therefore preventing the administrator from having access.
If users without the proper logon credentials attempt to log on to the License Management Console, the word “Welcome” will appear and no other options will be available. You will have the ability to choose a language but that’s it. See the example below:

Troubleshooting
To see what accounts have access to the License Management Console, open Program files\Citrix\Licensing\LMC\Tomcat\conf\tomcat-users.xml. An example of the file is shown below:

Resolution
To modify the tomcat-users.xml file to reflect the new credentials:
1. Open the file with a text editor.
2. Modify the line, [ username="Servername\Administrator" ] to reflect the new domain or server name.
3. Save the file and relaunch the License Management Console.
4. The roles= line can also be edited if necessary.