Hi this is a known issue if the license-server does not have the proper permission to update the AD-Attributes
Windows RD Licensing: Double license from uppercase and lowercase user name
This can be happen if the license attributes are not able to be updated on the user >account object due to lack of permission. What I would recommend is to first grant the >necessary permissions in AD, and then you can rebuild the database to clean things up.
When things are working properly, if a user logs on you should see their license issued >as you do now in RD Licensing Manager, and you should see the RD licensing attributes on >their user account object. You may use AD Users & Computers -- View Advanced Features ->- right-click on the user -- Attributes tab -- look for several msTS* attributes such as >msTSExpireDate, msTSManagingLS, etc. If these are blank and the user shows up in RD >Licensing Manager it is likely the permissions issue.
You can grant the permissions using Active Directory Users and Computers using below >basic steps:
On the OU that contains your users, right-click and choose Delegate Control... , follow >wizard
On Users and Groups page, click Add and then enter SELF
On Tasks to Delegate page, select Create a custom task to delegate
On Active Directory Object Type page select Only the following objects in the folder, >then scroll down and select User objects
On Permissions page, select General, then scroll down and select Read and write Terminal >Server license server
Once you have updated the permissions, please log on with a user account that doesn't >have their licensing attributes populated and then check after successfully logged on >that the attributes now have values.