Update SMB VPN requirement

docs/storage/petalibrary/mounting.md

@@ -6,7 +6,7 @@ Users with Petalibrary allocations may access and transfer files to/from their l
 
 SMB (Secure Message Block) is a cross platform network sharing protocol that allows users to mount their Petalibrary allocations onto their local machines. SMB is supported on all major operating systems and all it takes to mount is a simple connection to CURC's network.
 
-**You must be on the CU Boulder internal network in order to access your allocation with SMB. Off-campus users can use VPN to login to the internal network.**
+**You must be on the CU Boulder VPN to establish an SMB mount, even if you are already on a campus network.**
 
 **Note:** SMB support for individual Petalibrary allocations is limited at the moment and requires additional setup from a system administrator. Please contact rc-help@colorado.edu if you’d like to set up SMB support with your Petalibrary Allocation.