Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
Dear Kowsalya Vijayan1,
Good day! Thank you for posting to Microsoft Community. We are happy to help you.
We went through your post carefully and understand that you are trying to get the documentation link, which gives the average response times for the excel SharePoint for concurrent users.
As far as we know, the response time may be affected by network condition, backend server load, file size and etc... We've done a lot of searches, however, have not found the documentation link that gives the average response times for the excel SharePoint for concurrent users currently. Below is the official article we've found that might help for your reference:
Introduction to performance tuning for SharePoint - Microsoft 365 Enterprise | Microsoft Learn
Tune SharePoint in Microsoft 365 performance - Microsoft 365 Enterprise | Microsoft Learn
Given this situation, we'd sincerely recommend you contact your Microsoft 365 admin to contact Online Support team for more help. The support team over there has higher permission than us, they can involve more resources to confirm the scenario with you.
For reference: Get support - Microsoft 365 admin | Microsoft Docs, you can select online support or phone support to have a live chat with the support engineers. This is the most efficient way for handling this case as per the situation.
About how to find the admin in your organization, you can refer to How do I find my Office 365 admin
If the understanding above is not consistent with yours or any further assistance needed, please feel free to post back and point that.
Sorry for the inconvenience again. Your patience and understanding are highly appreciated. Hope you stay safe and healthy.
Sincerely,
Rhoda | Microsoft Community Moderator