Our environment is mainly Windows based computers. We have a handful of MacBooks though. The one I'm working on is running Lion. We've been using our EMC NAS for about 4 years now. When I try to connect to one of the shares from the Mac, our entire infrastructure goes to crap. The second I provide credentials on the mac, I just get a spinning wheel. All of the Windows PC's lose access to the shares. My options are limited since this is a production environment. I can't tell whether the NAS is actually locking up or if the network is flooded... Any help at all would be extremely appreciated. I realized you may need more information. let me know what that may be. Thanks.