Hi, we have the same problem using synology share, here is my /etc/fstab:
//192.168.6.12/pbs01_be**** /mnt/pbs01_be**** cifs uid=34,noforceuid,gid=34,noforcegid,credentials=/root/.smbcredential,iocharset=utf8,vers=3.0,noperm,cache=none 0 0
//192.168.6.12/pbs01_abz...