Searching by full name "Firstname Lastname" on the resource/resource Manager filter is currently not supported.
It is possible to filter by Firstname/Lastname/Username, but the Fullname is not an option at the moment.
For instance, on the new UI, open a Project.
Click on Staff.
Click on the "+" icon to add a Resource.
On the Resource field, type iin the name of the resource:
Typing the Firstname Lastaname will not show up any results.
Typing either Firstname or Lastname or Username will display the results as desired.
Clarity PPM 15.x
This is working as designed.
Filtering by "Firstname" or "Lastname" will display the values matching accordingly.
Filtering by "Firstame Lastname" will not return any results.