Adobe Reader DC 2015 - eSignature not roaming with Citrix UPM

Adobe Reader DC 2015 installed on a Windows Server 2012R2 XenApp 7.15 image.

It seems the user's e-Sisgnature information are saved under \%userprofile%\AppData\Roaming\Adobe\Acrobat\DC\Security\, on the following files:

• reader_fss_signature_initials
• reader_fss_signature_initialsi
• reader_fss_signature_initialsk

This folder is currently being redirected to a file share. If I create a new e-Signature and chose to save it, the size of the some of these files increase (I assume as expected). If I logoff and log back in, then chose "File and Sign Tool", these files get recreated. What's the reasoning behind this? Any way to actually have those e-Signatures persist across logon/logoff?

Any help is greatly appreciated. Thanks and best regards,

Lucas.