Files is Locked by Valued Customer EXCEL

[John M]

I have a situation where we have several people who may edit an Excel file.
When the boss needs to use it, he tries to open it and gets "File is locked
for editing by valued customer"
We understand about no multiple edits, but the issue is, since the box does
not say so, we do not knw who has it open.
Is there a way to fix that?
I went to one users system to make sure the registered owner had his name in
it.
That still did not fix it.
Any help?
Thanks

 

[google]

In Tools->Options->General, the username is likely "valued customer".

Get your office staff to create unique MS Office identities, or leave
them blank (in which case, Excel should pick up the Windows login
name).

 

[John M]

Many thanks, as you know by now, that does it.