The max limit of resource 'Last Name' field is 32 characters for any user in clarity. Is there any option by which this could be expended?
Clarity PPM 15.x, 16.x
This is a limitation, and can not be reconfigured a this time (the 32 limit is at the db and how the tables are set up).
Some information on this can be found on this post in the communities:
If you would need this to be considered for a change by Product Managment and possibly include it in future releases, you might want to raise an idea: