Hi Hamedg,
I looked into your request and see that the "-exclude" flag is now introduced in XCP 1.6.2, which the reference document for XCP 1.6.2 does not describe the flag or all the various parameters it supports. I have communicated this to our Engineering Team to update the documentation. I apologize in advance.
For your reference: XCP 1.6.2 to add exclude filter for files and folders
Regards,
Team NetApp