We would like to review this issue once more to ensure we can maybe fix it more holistically.
To do that we first would need to figure out which exact setting made it work for you.
Would you be able to do some quick testing of changing values in user.conf and restarting mediacenter and then check if connection still works? The steps would be:
sudo systemctl stop mediacenter
nano /home/osmc/.kodi/.smb/user.conf
sudo systemctl start mediacenter
The lines in user.conf should be as follows (you can comment out the others with # so no need to delete them
- Test just one line
client lanman auth = yes - If first test not successfull try the two lines
client lanman auth = yes
client use spnego = no - Only if that is not successfull added the third line
client lanman auth = yes
client use spnego = no
client ntlmv2 auth = no
The line of lanman auth = yes would not be needed for any of our test as it doesn’t impact the client side. So you can just delete that as the first try.
Many thanks for your help.