How does ID mapping work with blank values incoming to C4C ?

[Ticg]

If a field is part of the ID mapping requirement in C4C integration, and a blank value comes over from ECC / CRM, will it simply translate as blank in C4C ?

I know if a non-blank value comes in, ID mapping will try to resolve the mapped value.  If it's not mapped, it will error out. 

What if a blank value comes in ?

[Former Member · Accepted solution]

If its not a mandatory field in C4C than it is blank, if it is mandatory it will throw content error.