Hi!
I have noticed when I already have the Jamf fileshare SMB share mounted in Finder.
It will fail to mount again using Jamf Sync 1.5.1, it keeps asking for the share account username/password.
If possible add some extra check to see if share already mounted and provide a warning dialong, something like this to see if mounted might work:
mount | grep "name/of/JamfShare"
Thanks!
Best regards
Mikael