VB.net Excel Add-in not connecting on user machine

Hi

I have a VB.net Excel Add-in that connects to SQL databases. It usually connects will when I install it on other  machines except for a case today, which shows the error below. Why would
things work fine on most computers and then not on this?

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Murray BrownMicrosoft Cloud Azure/Excel Solution DeveloperAsked:
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CodeCruiserConnect With a Mentor Commented:
It looks like either the computer and SQL Server are not on same network or the connection is being blocked by a firewall. The error means that this client is unable to reach the SQL Server.
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Murray BrownMicrosoft Cloud Azure/Excel Solution DeveloperAuthor Commented:
Thanks very much. It was a firewall.
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