Is there any process or setting to remove Domain name ("Domain name"\XYZ) from all users list on SLM ?
There is no such setting to my knowledge. It would be practical because it would prevent one user to be recognized as multiple accounts in Snow.
This could be addressed if at some point Snow allows to link several user accounts into a single entity. There is no development towards that goal for now as explained recently in this thread.
There's a related item on the ideas board from Gemma which might be of interest, feel free to add your vote
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