Why can't I mount a CIFS share when specifiying vers=2.0,sec=ntlm in Red Hat Enterprise Linux 7.5?

Solution Verified - Updated -

Issue

Unable to mount a CIFS share when specifying vers=2.0 and sec=ntlm in the mount options in RHEL 7.5.

Environment

  • Red Hat Enterprise Linux 7
    • Seen on Red Hat Enterprise Linux 7.5 (kernel 3.10.0-862)
  • SMB/CIFS

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