Certificate Search Strings

[el_schalo]

Hello fellow OpenVPN configurators,

I've noticed that the available search strings for the option "--cryptoapicert" are limited to "SUBJ" for the "CN" and "THUMB" for the "Fingerprint."
However, to create a general OpenVPN configuration that works for our needs, we would like to search for another unique identifier: the "e-mail address" ("E")!
Can anyone tell me what the search string key is for that specific certificate field?

Thank you in advance for your help!

Best regards,
el_schalo.