A few months ago we started receiving tickets on slow network share mounting as well as unable to mount multiple network drives at the same. The first will mount but any following drives will not. I found tons of great info on the web with help on Jamf Nation. Disclaimer (This may already be on here, but broken up in to multiple threads)
Below is a simple script that sets SMB version 2. We have found that in a Windows environment SMB 2 works best as it has proven better stability and able to mount multiple network drives without issues. This is merely a work around to SMB v3. We have tested and it is now being deployed as a policy.
-set to run once per computer.
#!/bin/sh
echo "[default]" >> /etc/nsmb.conf
echo "protocol_vers_map=2" >> /etc/nsmb.conf
Hope this helps others.
https://community.spiceworks.com/topic/2113268-apple-to-windows-server-2012-r2-issues
