"Adobe Acrobat Digital Signature" file disappeared from Mac KeyChain after installing Acrobat Pro DC

Hi,

I have two MacBook Pros, newer and older.  Both use the same KeyChain, synched by Apple.  On the old MacBook Pro I have an old Adobe Acrobat 9 Pro (version 9.5.5).  On the newer MacBook Pro, I have recently installed Creative Cloud's Adobe Acrobat Pro DC.  I am able to use my digital signature on my old MacBook Pro with Acrobat 9 Pro.  To do that, Acrobat knows where my signature file is, and I use my password from my KeyChain for the "Adobe Acrobat Digital Signature" file.  However, when I try to apply a digital signature on the newer MacBook Pro with Acrobat Pro DC, it doesn't find my signature file.  Furthermore, when I look in my KeyChain on the newer MacBook Pro, I cannot find the "Adobe Acrobat Digital Signature" file.  This is odd, since the KeyChain is typically synched across my two MacBook Pros.  This was not a problem before installing Adobe Acrobat Pro DC on the newer MacBook Pro.  So, I assume that during the installation, it somehow deleted my older "Adobe Acrobat Digital Signature" file.  How can I share my signature file across the two MacBook Pros, and the two different versions of Acrobat Pro?

Thank you!