//phoenix/share /mnt/phoenix cifs noauto,uid=testing,gid=users,file_mode=0664,dir_mode=0775,iocharset=iso8859-15,credentials=/home/pcreds 0 0
//server/storage /mnt/server cifs noauto,uid=testing,gid=users,file_mode=0664,dir_mode=0775,iocharset=iso8859-15,credentials=/home/screds 0 0
//vault/Operations/ /mnt/vault cifs noauto,uid=testing,gid=users,file_mode=0664,dir_mode=0775,iocharset=iso8859-15,credentials=/home/vcreds 0 0
"Phoenix" is the only one I'm having issues with (and your suggestion fixes the issue). It's XP and the only one that I know for sure is updated regularly. "Server' is W2k3 Storage Server and it probably hasn't been updated in a while. "Vault" is some Ubuntu LTS I think, no idea about its update status.
]]>Example:
//10.1.10.50/share /mountpoint cifs sec=ntlm,noauto,x-systemd.automount 0 0
Please note ntlm is NOT secure!
]]>