Both clients can print direct to the IP printer locally.
Both cleint machines can log into the TS session and printers get redirected.
When sending a print job from client A from the TS session everythiing prints ok. When sending the same print job from client B from a TS session the job fails to print off.
Both users are subject to the same group policies.
Both users are a member of the same security groups.
Printing via a local admin fails in TS session fails.
Printing via a domain admin from TS also fails.
No error messages as far as I can see.