I have a handful of users who have a strange, recurring issue with Offline Files and DFS in Win7 SP1 x64.
We have a DFS root \\domain.local\DFS. Server ukln1fs1 is a root replica, running a fully patched instance of Server 2012 R2. dfsnamespace is a DNS alias of ukln1fs1, and the SPNs for host/dfsnamespace<.domain.local> and cifs/dfsnamespace<.domain.local> are registered with that server.
Clients have the Documents folder redirected by GPO to \\dfsnamespace\DFS\-teamfolder-\-username-\docs and redirection works fine.
Sometimes when clients are disconnected from the network and then reconnect, or when they start up disconnected from the network and then connect, they are unable to connect to\\dfsnamespace\dfs. They get error 80070035. Clients can connect to\\dfsnamespace fine and to the individual shared within the DFS structure. This affects all users on the computer once it has begun occurring, and the only resolution is to restart the computer whilst connected to the domain.
Kerberos is using TCP (MaxPacketSize 0)
LanManServer & LanManWorkstation signing requirements match (EnableSecuritySignature 1, RequireSecuritySignature 0)
Have used FormatDatabase on the CSC service to rebuild the offline files cache.
Latest hotfixes for Win7 file services and offline files components are installed: KB2775511 (enterprise hotfix rollup), all latest hotfixes from KB2820927 (collection of enterprise hotfixes including offline files and folder redirection components), all latest hotfixes from KB2473205 (file server technology services).
Adapters & bindings order has the SSL VPN adapter at the top followed by the NIC then the wifi adapter. IPv4 is a the higher priority protocol in adapters & bindings.