If you go into the Dynamics CRM Portal and change the Friendly name for your CRM organization that changes it for everyone when they access CRM via the browser. But it doesn’t change the name in the Outlook client. Each user will have to change it manually. Lets see how this works.

Select the Name field and replace it with the new friendly name.

But the change in the admin center doesn’t change the Outlook Client

Launch the Configuration Wizard, select Rename and then enter the revised Friendly name, Click Okay and you are done.