Hi @Yrrag Jerios (Accenture) ,
This situation can also result from that SSPI uses Kerberos authentication to delegate over TCP/IP and Kerberos authentication cannot complete the necessary operations to successfully delegate the user security token to the destination computer that is running SQL Server.
To solve this problem the easiest way is to download the Kerberos Configuration Manager in this link: https://www.microsoft.com/en-us/download/details.aspx?id=39046, which can help you troubleshooting SPN and delegation issues.
After your downloading the Kerberos Configuration Manager you can check this link :https://learn.microsoft.com/en-us/troubleshoot/sql/connect/cannot-generate-sspi-context-error#fix-the-error-with-kerberos-configuration-manager-recommended and follow the guidance on it.
Or you can use the method on this link:https://learn.microsoft.com/en-us/sql/database-engine/configure-windows/register-a-service-principal-name-for-kerberos-connections?view=sql-server-ver15#Manual to register SPN manually.
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