I'm trying to search for events that have some contact id invited.

I tried:

https://crm.zoho.com/crm/private/xml/Events/getSearchRecordsByPDC?scope=crmapi&authtoken=AUTH_TOKEN&searchColumn=ContactID&searchValue=99999

returns error 4420 -  Invalid Search Column.Check it now

I also tried:

https://crm.zoho.com/crm/private/xml/Events/searchRecords?scope=crmapi&authtoken=AUTH_TOKEN&criteria=(ContactID:99999)

returns error:  4832 - A PI call cannot be completed as the Criteria parameter contains empty field name

As you can see, in both cases I get an error. 

When trying to query using 'Subject' field with searchRecords I receive proper results so the API call is probably right.

I also tried using 'ContactID', 'CONTACTID', 'RELATEDTOID', 'CONTACT_ID', 'WHO_ID' as the contact id field name without success.

What is the proper way to find events that contains some contact by its ID?

Thanks,

Meir