Hi @rnagpal,
Could you please share a screenshot of the configuration of your flow?
Could you please share more details about the results returns returns from the Azure Kusto query connector?
Do you want to get all values of a column and append each with @microsoft.com, then send an email to those email address?
If you want to get all values of a column and append each with @microsoft.com, then send an email to those email address,I have made a test on my side to create a sharepoint list with a single line of text column "EmailName"as below:

And I have created a flow as below:


You could insert the column's dynamic content of the Azure Kusto query in the Compose field.
Note:
The expression in the Compose 2 as below:
concat(outputs('Compose'),'@microsoft.com;')
The flow would run successfully as below to send the email to the users:
