Create web service in NAV 2018 and use it in BC Saas

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Posted on by CU12081533-2

Is it possible to create a web service in Dynamics NAV 2018 and make it public to consume it in Business Central Saas?

I have a web service in Dynamics NAV 2018:
http://localhost:7047/DynamicsNAV110/WS/CRONUS/Codeunit/NAV_WebService

But I can only access locally, how can I make it externally I can access, more precisely with Business Central Saas.

If possible I could support me, I would appreciate it very much.

Categories:

Dynamics 365 Business Central

Microsoft Dynamics NAV

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Mohamed Amine Mahmoudi 26,801 Super User 2026 Season 1 on at

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Hi @CU12081533-2,

I think the best solution in thiscase is use Reserve Proxy.

Best regards,

Mohamed Amine MAHMOUDI

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Jeffrey Bulanadi 9,112 Super User 2026 Season 1 on at

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Hi

Yes, it’s possible to consume a web service from NAV 2018 in Business Central SaaS, but you’ll need to make sure the NAV service is externally accessible and properly secured. Here’s how to approach it:

1. Make the NAV web service externally accessible

Ensure the NAV server is hosted on a public-facing machine or VM

Open the required port (typically 7047 for SOAP) in your firewall

Replace localhost with your public IP or domain name in the service URL

Confirm that the NAV instance is configured to allow external SOAP requests

2. Secure the connection

Use HTTPS instead of HTTP to protect data in transit

Set up a valid SSL certificate on the NAV server

Enable authentication (Windows or NavUserPassword) and ensure the user has permission to access the web service

3. Consume from Business Central SaaS

In BC SaaS, use HttpClient in AL to call the NAV web service

Make sure the endpoint is reachable and returns the expected response

If you're using SOAP, you’ll need to construct the XML payload manually or use a proxy class if calling from an external app

Here’s a helpful guide that walks through publishing and testing web services in NAV and BC: How To Publish & Test Webservices in NAV/BC – ArcherPoint

If you find this helpful, feel free to mark this as the suggested or verified answer.

Cheers
Jeffrey

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YUN ZHU 99,090 Super User 2026 Season 1 on at

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You can only access this server by opening its port to the public Internet, although this is not safe.
BC Cloud currently cannot access On-Pre records.

Hope this helps.

Thanks.

ZHU

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RockwithNav 8,967 Super User 2026 Season 1 on at

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To access your NAV 2018 web service from outside your network, you need to:

Open port 7047 on your router or firewall (this is called port forwarding).

Use a static IP or a domain name so the service can be reached consistently. Change the NAV Server settings so it connects on all network interfaces, not just on your local computer.

Turn on HTTPS for secure access and set up authentication (username/password or other methods).

If you're trying to connect NAV 2018 with Business Central SaaS, it can be tricky because of version and security differences. The best way is to use a tool like an API gateway or Azure Logic Apps to act as a bridge between the two systems.

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