How to change initial username?

I have a few excel files that are shared among a few users. When the same
file are in used by more than 1 user, a message box will promt that "user A"
is using the file and gives the option "read-only", "notify" and "cancel".
Question is, how do i change the username in the message box? As far as i
know, you can only change the username when we install Microsoft Office.

Change the User Name on:
Tools|Options|General Tab

EeVee wrote:
>
> I have a few excel files that are shared among a few users. When the same
> file are in used by more than 1 user, a message box will promt that "user A"
> is using the file and gives the option "read-only", "notify" and "cancel".
> Question is, how do i change the username in the message box? As far as i
> know, you can only change the username when we install Microsoft Office.

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Dave Peterson