Unable to enable use a certificate option for Digital signature.

[Former Community Member]

Hello all,

Could any one help me that how to enable use a certificate option in digital signature .IN our Organization we are suppose to do some digital signatures But we have tried all the options couldn't find the same .

version using:Adobe XI.

Error:Unable to use "use a certificate option"(the Radio button itself is disabled not able to enable)

Request o please Suggest will appreciate the help !!

Thanks!!