It's not clear where you need to make this change. But the following article may help: How to change the Logo in the Banner?
If this posting does not resolve your issue, please provide further details and possibly a screenshot to clarify your needs.
If you are referring to the User organization (not the logo) entity itself, you cannot change it. You may duplicate the entity, give it a desired name, but then you'd have to manuall readd permissions.
Greetings shalini visveswaraiya,
Following up with you on the original question posted here, can you please indicate if the recommendations given by either Sharon, Varathan, or Polina answered this for you?
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