As of Domino 4.x it is not possible to mount CIFS (Microsoft) shared drives. Instead, we've found success with the `smbclient` utility, the docs for which can be found here: https://www.samba.org/samba/docs/current/man-html/smbclient.1.html
You can install this tool by running `sudo apt-get update && sudo apt-get install -y smbclient` from within your workspace terminal. Once it's installed, you can use it to download and upload files between your workspace and the remote share. Some examples to get you started:
smbclient //nas.server.name.xyz.com/sharename $password -W MYDOMAIN -U $username -c 'get path/to/file.csv file.csv'
This will connect to the //nas.server.name.xyz.com/
To push the file back to the remote share:
smbclient //nas.server.name.xyz.com/sharename $password -W MYDOMAIN -U $username -c 'put file.csv path/to/file.csv'
Another alternative would be setting up SCP via ssh functionality.
In all cases, we recommend storing your username and password as environment variables under your Domino user account, and then using those variables instead of typing usernames/passwords directly into your workspace terminal.