SQL server SSPI Handshake Failed with error code 0x80090311

Hi ravioverland,

The error code 0x80090311 indicates that the SSPI handshake failed because the client could not contact an authority for authentication. This can happen for a number of reasons, including:

• The domain controller is unavailable.
• The client and server are in different domains and the trust relationship between the domains is not configured correctly.
• The client or server is using an incorrect SPN (service principal name).
• There is a problem with the network connection between the client and server.
• There is a problem with the Kerberos authentication process.

You can try to use the following steps:

1. Check the availability of the domain controller. Make sure that the domain controller that the client is trying to contact is available and online.
2. Verify the trust relationship between the domains. If the client and server are in different domains, make sure that the trust relationship between the domains is configured correctly.
3. Check the SPNs. Make sure that the client and server are using the correct SPNs.
4. Troubleshoot the network connection. Make sure that the network connection between the client and server is working properly.
5. Reset the Kerberos cache. You can reset the Kerberos cache on the client and server to try to fix any problems with the Kerberos authentication process.
6. Install the latest Windows updates. Make sure that the client and server computers have the latest Windows updates installed.
7. Restart the client and server computers.
8. Try connecting to the SQL Server again.

You can use this link as a reference:
Lost a connection to AD when SQL is trying to authenticate - Microsoft Q&A