Could be long ACL lists with many unique ACEs that need looked up on AD, and/or 
slow ADCs, and/or slow AV, and/or slow net:

for each file show the outputs of

        $ ls -dl $f
        $ getfacl $f
        $ icacls "`cygpath -m $f`"

and also attach as text, the output from strace on the cp command, as it will 
show the timing and delays e.g.

        $ strace -o cp-strace.log cp ...



I couldn't run strace on the Cygwin command because the issue is really 
intermittent. I did have another Cygwin cmd, 'mv', that was hung so I ran the 
commands below on the file it was trying to move:

D:\lsenv\law\lsapps\edi\work>ls -dl valid_ediout.20230413113258.tmp
-rwxrwxrwa   1 Administrators   INFORBC\Domain Users        749 Apr 13 
valid_ediout.20230413113258.tmp

D:\lsenv\law\lsapps\edi\work>getfacl valid_ediout.20230413113258.tmp
getfacl: valid_ediout.20230413113258.tmp: No such file or directory

D:\lsenv\law\lsapps\edi\work>icacls "`cygpath -m 
valid_ediout.20230413113258.tmp"
'cygpath -m valid_ediout.20230413113258.tmp; The system cannot find the file 
specified.
Successfully processed 0 files; Failed processing 1 files

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