A meet and confer is not required prior to filing a motion to quash subpoena pursuant to CCP 1987.1. However, under certain circumstances it may not be a bad idea to meet and confer to see the dispute can be resolved or narrowed.
This response is for information purpose only and does not constitute a legal advice. This response does not create an attorney-client relationship.
I do not believe there is a mandatory meet and confer requirement with a motion to quash a non-party witness. However, you should attempt a meet and confer letter if you have time. Then, your or your employer should move forward with the quash the subpoena with the meet and confer attached as an exhibit to the motion.