Pulled out an old chestnut today… to be exact a 7 year old blog post to prove a point.
Exceptions to the rule – When you may WANT to turn off SMB message signing – Jesper’s Blog – Site Home – TechNet Blogs:
So Windows 2012 Essentials is a domain controller … a domain controller that is a file server and a remote access server and a client backup server and …well you get the idea. And because it is a domain controller SMB signing is enabled by default. If you set up Windows 2012 server essentials, you may want to disable SMB signing.
As showcased in this forum post…
File transfer speeds drop by 75% after joining Domain:
Jason Yoder, MCT: Disable SMB signing:
You may also have to do this to connect scanners and other devices to the network.
And if you really want to do it the RIGHT way… do it like Eriq would want us to do it:
How To Disable SMB Signing in SBS 2003 :: Lessons Learned: