'The'account is not authorized to login from this station' error while trying to acccess network share

Solution 1:

As all the Windows 2000-related articles would have told you, had you read them, this error occurs when the client and server has conflicting SMB Signing policies configured.

Namely, the server tries to enforce SMB Signing but the client either refuses or are unable to negotiate SMB Signing with the server

These settings can be defined using either Local Group Policy (gpedit.msc) or Group Policy if you use Active Directory.

^ These are probably the droids you're looking for

Solution 2:

Bad DNS Records

Here's our resolution for this particular situation:

Our DNS server had two DNS A records for the problematic server. One record had the correct IP address and one had an a different address. Once I deleted the bad record, this issue went away. The bad record had a timestamp from around the time this issue started. At this point, I am not sure how the record got there, but I believe it was from a dynamic update.

I am now in the process of setting up scavenging on our DNS servers.