Project Portal locks documents so that only one user at a time can edit the document's properties or attached files. Documents can be locked or unlocked automatically by the system or manually by a user.
Project Portal locks the document whenever you:
The files attached to a document are locked separately from the document to which they are attached. This allows multiple people to work on separate files attached to the same document at the same time if the document is unlocked. You cannot create a new version for or delete a document if another user has locked a file attached to the document.
Project Portal locks the file whenever you:
The lock is automatically released when the operation is completed or after 15 minutes.
To lock a document:
OR
Select the document name or on the Actions menu select View. The document's property page appears in the detail pane.
In the ribbon, in the Document group, click Lock.
The Lock command changes to Unlock, a locked icon appears at the end of the document's name in the document list, and a key icon
appears in the header of the document's property page.
Note The lock may be removed by the person who set it or by a privileged workspace user with the Unlock or Upload file commands or by changing the document's Status property.
To unlock a document:
OR
Select the document name or on the Actions menu select View. The document's property page appears in the detail pane.
In the ribbon, in the Document group, click Unlock.
Note If the Unlock command is unavailable, the document is locked by another user and you may not unlock it. Clicking the locked icon opens a form with which you can send an email link to the locked document to the user who locked it with a request to open the lock.
Related concepts
Working with comments and discussions
About transferring properties with Office documents
Related tasks
Viewing and editing document properties