MYOB AccountRight and cloud storage syncing tools apparently don't play well together. MYOB AccountRight causes an issue with cloud syncing tools that is constantly trying to upload/update files called "Clearwater AU MYOX and NZ MYOB". 

Affected: OneDrive and possibly, Dropbox and Google Drive.

Potential other issue: To avoid corrupting a company file, move the MYOB company file to a folder that isn't directly synced to the cloud.

You can still save backups to a cloud synced folder.

Solution

Created script to automatically remove (if they exist) the pesky MYOB Samples folder. Runs at logon and every hour.

Save the following .cmd file to %localappdata%\ITSolver\remove-MYOB-Sample-Company.cmd

rmdir "~\Documents\MYOB\My AccountRight Files\Samples" /s /q

Run command script silently with silentcmd.vbs

Set oShell = CreateObject ("Wscript.Shell") 
Dim strArgs
strArgs = "cmd /c remove-MYOB-Sample-Company.cmd"
oShell.Run strArgs, 0, false

Scheduled script to run at logon and repeated hourly.

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