Hi @K Vijetha ,
Please kindly understand here we mainly focus on general issue about Outlook desktop client, considering your issue may be more related to Power app, which is not supported in our Q&A forum now, in order to solve it better, it's suggested to post your issue in our dedicated power apps community:
https://powerusers.microsoft.com/t5/Forums/ct-p/PA_Comm_Forums
The reason why we recommend posting appropriately is you will get the most qualified pool of respondents, and other partners who read the forums regularly can either share their knowledge or learn from your interaction with us. Thanks for your understanding and hope your question will be resolved soon.
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