virtualmin scheduled backup password fail that works with manual

I've configured my virtualmin server to backup all virtual servers nightly to another system via ssh. When I run this setup manually with the saved password, it works fine. However, when it runs at the scheduled time, the password fails. I can login via ssh with the password, so it appears to be something with the scheduled/cron job part. The password is complex, but does not have an @ in it.

We've tried changing the password to others, but the behaviour repeats itself.

help...

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Does the password perhaps have any other special characters, like comma, slash or backslash?

No, we've tried a variety of passwords, some very simple (lower case and numbers only). All have the same issue. Works manually, fails using the scheduled time.

Here's the log result: Failed to connect to SSH server : root@10.0.8.54's password: Permission denied, please try again.

root@10.0.8.54's password: Permission denied, please try again.

root@10.0.8.54's password: Permission denied (publickey,gssapi-with-mic,password).

lost connection

Does it still fail if you setup the destination account to allow password-less (public key) logins by root?

That would help determine if the cause is really the password, or something else..

I changed the setting. We'll see tomorrow. Thanks.