Попробуйте использовать это, он будет циклически перемещаться по папке, пытаться найти файлы (файлы Excel) и попытаться найти строки в указанных файлах и, если совпадение найдено, изменить имя.
Sub LoopThroughFiles()
'loops through all files in a folder
Dim MyObj As Object, MySource As Object, file As Variant
Dim wbk As Workbook
Dim path As String
Dim st As String
file = Dir("H:\TestCopy\testing\") 'file name
path = "H:\TestCopy\testing\" 'directory path
While (file <> "")
Set wbk = Workbooks.Open("H:\TestCopy\testing\" & file)
MsgBox "found " & file
' path = path & file 'path and filename
Call newloopTrhoughBooks
wbk.Save
wbk.Close
' Call loop_through_all_worksheets(path)
file = Dir
Wend
End Sub
Sub newloopTrhoughBooks()
Dim book As Workbook, sheet As Worksheet, text As String, text1 As String
Dim logic_string As String
Dim logic_string2 As String
Dim logic_string3 As String
logic_string = "GTLB"
logic_string2 = "SALARY"
logic_string3 = "GROC"
For Each book In Workbooks
text = text & "Workbook: " & book.Name & vbNewLine & "Worksheets: " & vbNewLine
For Each sheet In book.Worksheets
text = text & sheet.Name & vbNewLine
text1 = sheet.Name
If StrComp(logic_string, text1) = 1 Or StrComp(logic_string2, text1) = 1 Or StrComp(logic_string3, text1) = 1 Then 'compare file name
ActiveSheet.Name = text1
ActiveSheet.Name = "Change1"
End If
Next sheet
text = text & vbNewLine
Next book
MsgBox text
End Sub