Every time a particular user starts NX an Advanced Assemblies license is checked out. (Either a Premium bundle "NX93110_adv_assembies" (MACH 3 bundle), or 26 tokens of Value Based Licensing "nx_design_token")
What cause this to happen?
If a user has enabled "Show Component Groups" in the Assembly Navigator, (MB3 -> Show Component Groups on the column header in the Assembly Navigator), this will result in license covering the Advanced Assemblies function to be checked out.
If you, as a system manager, want to ensure that this never happens you need to make a change to a NX customer default site level setting and lock it. In NX customer defaults under Assemblies --> General --> Miscellaneous tab, disable the parameter "Restore Show Component Groups Setting"
As the tooltip in customer defaults state:
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This option determines whether or not an attempt to restore the state of the
Show Component Groups check box in the Assembly Navigator will be made on NX
Startup. The attempt will be successful if all the following conditions are
True.
1. Checkbox is turned ON (in customer defaults).
2. The Show Component Groups checkbox was turned ON when last exiting NX.
3. An Advanced Assemblies license is available.
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All 3 conditions must occur for "Show Component Groups" to be enabled and
Advanced Assemblies license to be checked out when NX is started.
NX 2406 and later