Sometime it can happen when you try to open an excel file, you receive a message telling that the excel file is locked by somebody and you can access it only in read only mode, even if the other user is not using it.
- Connect on the server that has the File Server role.
- Open Computer Management
- In the console tree, expand System Tools/Shared Folders/Open Files.
- Search the file locked in the list, click right on it and select Close Open File
Now the file is not locked anymore and you can edit it.