- You can't attach project collections that are detached from TFS 2010 or TFS 2012.
- You can reattach project collections that are detached from TFS 2012 or TFS 2012. However, your permissions or identities may be lost in TFS 2012.
- Upgrade TFS to Update 3 together with the collections that are still attached.
Note This method avoids detaching collections before the upgrade to TFS Update 3.
- Upgrade TFS to TFS 2012 Update 4 , and then reattach collections that were previously detached.
Article ID: 2885212 - Last Review: Sep 26, 2013 - Revision: 1