Thinking more about it, I'm not actually sure it was CP/M-68K. I remember hearing something about before building the 68k workstations they built a couple test units with x86 motherboards to test out the proposed workstation form factor.
Accounting may have ended up with one of those, in which case it would have been plain old CP/M-86.
How much accounting software was there for CP/M-86 or CP/M-68K?
CP/M-80 was a popular platform for business software in the late 1970s and early 1980s, but CP/M-80 software wouldn't run on CP/M-86 or CP/M-68K due to the different CPU architecture. A lot of this software was written in assembler (for performance), which meant that porting to another CPU architecture was closer to a rewrite than just a recompile. (There were tools to convert 8080 assembly source to 8086, although I don't how well they worked.)
I was under the impression that most CP/M-80 business software vendors moved to the IBM PC and PC-DOS/MS-DOS as their target platform, and not very many of them ported their software to CP/M-86 or CP/M-86K. (I could be wrong about that–this was all happening when I was a baby.)
IIRC, its propietary OS, SIM/M, was apparently a CP/M clone, later retronamed CP/M-80. Both dBase ii and iii ran on this fantastic small business machine.
Accounting may have ended up with one of those, in which case it would have been plain old CP/M-86.