Dear Vikram Singh Shah,
Welcome to Microsoft Community.
We understand that you are experiencing an error when adding the Azure add-in to Excel.
According to your description, you have tried to confirm your network connection information but still encountered an error when adding the Azure add-in. We are concerned that this is due to the unstable connection of the server in the network that prevents you from adding it successfully.
You can try to optimize your network to confirm:
Change DNS: "Start" > "Settings" > "Network and Internet" > Double-click to open "Change Adapter Options" > Right-click "Connected Network" to open "Properties" > Select "Internet Protocol Version 4", double-click to open > Check Use the following DNS server addresses > Preferred DNS server (4.2.2.1), Alternate DNS server (4.2.2.2) > OK > OK > Try again after changing, remember to change to automatic after success
Reset Internet Option network options: Press Windows (logo key) + R, enter inetcpl.cpl, then click Advanced, pull down to Security in the "Settings" list, check SSL3.0, TSL1.0, TSL1.1, TSL1.2 applications, and click "Restore Advanced Settings" below, then click "Apply" and "OK"
At the same time, in order to further help you alleviate the problem, we need to explain to you:
Problems related to the Azure plug-in require more professional technical information to help you solve them. I suggest you try to seek help in Microsoft learn (English only), where there are more experts in related fields who can provide you with better solutions.
It is designed to support advanced users like you. Many users prefer to ask questions and get more professional responses through this section.
Here is a link to the forum where you can raise specific situations and share your ideas for solving problems.
Azure App Service - Microsoft Q&A
We will keep this issue on file in case our great volunteers come up with ideas for you.
Best regards
Zenobia.Z | Microsoft Community Support Specialist