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I'm with same issue. I made a simple flow just to alert when as important email arrives in my inbox.
Power Automate - How to fix "Parameter 'To' cannot be null or empty"
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(211.20000000000002, 86%, 30%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EPD%3C/text%3E%3C/svg%3E)
Prita Dewi
25
Reputation points
I have created a flow to send multiples invoice via Outlook. Users will create the invoice, name it correctly and upload it to SharePoint document library and power automate will do the rest. The issue is at "Send an email (V2)" step in "to" column i've filled out with CustomerEmail but when I test the flow, there is an error "Parameter 'To' cannot be null or empty".
I have attached a screenshot of the flow.
The testing results:
Microsoft 365 and Office | Install, redeem, activate | For business | Windows
Microsoft 365 and Office | SharePoint | For business | Windows
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(147.20000000000002, 82%, 24%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ELZ%3C/text%3E%3C/svg%3E)
Ling Zhou_MSFT 23,620 Reputation points Microsoft External Staff2023-10-30T09:28:10.95+00:00 Hi @Prita Dewi,
The problem seems to be with your CustomerEmail variable. Can you share the steps in your stream above with me? I need to track down how this variable is generated. Please be careful not to give out your private information.
Thank you for your efforts in advance.
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