Regarding the SMB connection failure problem

I encountered a strange problem. A computer has been using duplicati for a while, and suddenly it showed a connection failure in the past two days.
I tried using other authorized users, changing the service account, adding the host name before the username, etc., but the results were the same.
Finally, I added
–auth-password=userpassword
–auth-username=username
to the advanced options, then clicked the test connection, and the connection was successful.
I don’t know why, so I’m sharing this with those who need it.

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