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The semaphore timeout period has expired

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I am trying to connect to a dataverse instance in SSMS. We can successfully connect to the DEV environment, but not our TEST environment. When connecting to test, we get an error saying 'The semaphore timeout period has expired'.

All the help articles I'm seeing are related to VPN configuration, but we can connect to one environment so I don't think that's the issue. Any ideas?

Thank you

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Microsoft Dataverse with Power Apps

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Ram Prakash Duraisamy 5,593 Super User 2025 Season 2 on at

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Hello @Anonymous,

As per my knowledge It's not related to Dataverse issue, i think its related to your network issue

If not try Clearing Cache and Cookies and try again and if the issue still persists try raising MS ticket

Please mark as Answer if it is helpful and provide Kudos

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Devikumari Krishna 988 Super User 2024 Season 1 on at

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Hi @Anonymous ,

This is definitely network and firewall issue.
Is your Dev environment working fine with the same SQL Server?
Please see if you opened SQL Server - by choosing Run as Admin.

https://community.bmc.com/s/article/TCP-Provider-The-semaphore-timeout-period-has-expired-error-raised-in-Control-M-Server-log-files#:~:text=The%20error%20%22TCP%20Provider%3A%20The,local%20System%20Administrator%20for%20assistance.

Hope this helps. Please mark my solution as accepted and give me kudos if you like my solution.

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Regards
Devi

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