Whenever I (re-)mount a SMB share, Mojave prompts me for my credentials. I faithfully enter my data, hit the "store in keychain" checkbox ("Password im Schlüsselbund speichern" in German), and the share is successfully mounted. Next time, for example after a reboot, it will ask for the username+password again.
My username consists of a domain and login ("mydomain\MYUSER"). Interestingly, when the dialog box opens, it only displays "MYUSER" in the form field, without the domain, and I have to type in the domain.
In the Keychain app, I am seeing an entry for this share, where everything seems to be fine. The domain is included in the account name there.
How can I debug or investigate this more? Or is this a known issue?
EDIT: Deleting the entries from the key chain did not help.
EDIT2: I connected through a LAN instead of WIFI, and I believe it did not prompt me for a password. I'll have to test that again though...