Methods and systems are provided for negotiating a session with a first server, wherein data within the session travels through at least a second server such as a proxy server; replacing a first client global unique identifier (GUID) with a second GUID generated by the second server; maintaining a GUID map table at the second server mapping the second GUID with the first GUID; requesting a plurality of leases on a file from the first server, wherein the each of the plurality of lease requests comprises a lease key and the second GUID, wherein the lease key is identical for each of the plurality of leases; providing caching services, wherein caching services are associated with a lease state corresponding to one of the plurality of leases; receiving an indication that a second client has made a lease request for the file; breaking the first lease upon receipt of the indication; and communicating a lease break notification to addresses associated with the second GUID.