Hi Kishor,
Thanks for your question.
In this scenario, you may need to tick the Save password option for your connection string.
To do this, please go to Excel menu Data, Go to "Connections---Properties---Definition" ,please check the option "Always use connection file" and "Save password". Please refer to below image:

Best Regards
Willson Yuan
MSDN Community Support
Please remember to click "Mark as Answer" the responses that resolved your issue, and to click "Unmark as Answer" if not. This can be beneficial to other community members reading this thread. If you have any compliments or complaints to
MSDN Support, feel free to contact MSDNFSF@microsoft.com