Hi ,
The error message is general and it is hard for us to do troubleshooting from forum support level. For LACP negotiation issue, we need to trace network traffic to find the clues.
Looking at network trace is really important because that will allow we quickly to look at both ends (Local Windows machine and switches). However, analysis of network traffic is beyond our forum support level and due to forum security policy, we have no such channel to collect user log information. So we recommend you open a case with MS Professional tech support service, they will help you open a phone or email case to Microsoft, so that you would get a technical support on a one-to-one basis while ensuring private information.
Here is the link:
https://support.microsoft.com/en-us/gp/customer-service-phone-numbers
Best Regards,
Candy
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