This profile translation will not switch from replace mode to add mode if the user is currently logged on or if the profile ...

This profile translation will not switch from replace mode to add mode if the user is currently logged on or if the profile is in use for other reasons.  In order to allow the switching, you need to remove or set the registry HKLM\Software\Microsoft\ADMT\DisallowFallbackToAddInProfileTranslation (REG_DWORD) to a value other than 1 on the ADMT machine.
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