Hi @Park, Dave, thank you for posting in the Q&A diễn đàn.
This is the fix for running into this error while trying vĩ đại open files from untrusted locations using Office client. Adding SharePoint site (or IP address of shared tệp tin server) should permanently solve the issue.
Just in case you have configured Form-Based Authentication for SharePoint Server 2019, here is a reference on additional settings: Did you know: there is an updated feature restricting form-based authentication in Office apps.
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