Hi @Acari27
According to your case description, you are transitioning from Skype to Teams (free) and you want to change your profile name.
I understand that you want to change your Teams name to your old Skype display name (single nickname - no last name) without affecting any other account details. Unfortunately, when you change your profile, it will be updated to your Microsoft account.
If you want to know more details, please refer to Update your profile in Microsoft Teams (free).
As you mentioned, click on your profile picture and then click on "Edit display name" (little pencil icon) to change the information.
Alternatively, you can log in to your Microsoft account and change your name in your information. (As mentioned earlier, when you change the information in Teams, it will be updated to your Microsoft account)
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