Hi ,
For slow performance issue, we need to collect some necessary network traffics and traces to analyze the cause. Tool such as Network Monitor and Process Monitor can be considered.
You could download Network Monitor tool from the following link:
https://www.microsoft.com/en-sg/download/details.aspx?id=4865
You could download Process Monitor from the following link:
http://technet.microsoft.com/en-us/sysinternals/bb896645
Meanwhile, please kindly note that analysis of log 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,
Sunny
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