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Need help with Egyptian E-Invoicing – Error at "Egyptian Tax Authority submit" action

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Posted on by RM-09090509-0

Hey everyone,

I’m in the process of implementing the out-of-the-box e-invoicing solution for Egypt in D365 F&O, and I’ve hit a bit of a wall.

I’ve imported the latest “Egyptian electronic invoice (EG)” feature and filled in all the required values in the pipeline (client ID, secret, etc.). After deploying everything, I tried submitting an invoice to the ETA portal.

Everything seems fine up until the "Egyptian Tax Authority submit" action – that’s when it throws this error:

System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.Dynamics.ElectronicInvoicing.Pipeline.Actions.EgMyRestClientActionBase.SendRequestAsync(CancellationToken cancellationToken) in C:\__w\1\s\src\Pipeline\Pipeline.Actions\EgMyRestClientActionBase.cs:line 304 at Microsoft.PowerApps.CoreFramework.ActivityLoggerExtensions.ExecuteAsync(ILogger logger, EventId eventId, ActivityType activityType, Func`1 action, IEnumerable`1 additionalCustomProperti

This happens right after the signed files are fetched from Azure.
I’ve already:

- Double-checked the client ID and secret with the customer – they’re all good

- Tried tweaking the pipeline setup and redeploying

- Revalidated the action parameters

Still getting the same error 😓

Has anyone else come across this? Would really appreciate any ideas or pointers.

Thanks in advance!

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Dynamics 365 Finance

Dynamics 365 Project Operations

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Jalal Sabir 10 on at

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Absolutely — here’s a focused solution-oriented reply you can use, tailored for your scenario with Egyptian E-Invoicing in D365 F&O:

Possible Solution for “System.NullReferenceException” at “Egyptian Tax Authority submit” Action in D365 F&O
You're on the right track with your setup, and this specific error —
System.NullReferenceException: Object reference not set to an instance of an object
— typically points to a missing or improperly configured parameter within the pipeline action, most likely within the SendRequestAsync method inside the EG-specific REST client base class.
Here are a few things to check and try:

✅ 1. Pipeline Parameters – Double-check Required Fields
Even though you’ve filled them out, recheck these in Electronic Invoicing > Features > Egyptian electronic invoice (EG) > Setup > Actions > Egyptian Tax Authority Submit:

Url – Make sure the ETA environment URL is correct (https://api.invoicing.eta.gov.eg for production or https://api.preprod.invoicing.eta.gov.eg for pre-prod).

API Version – Required for some setups.

Document UUID / Internal ID – Ensure this is populated in the context correctly.

Certificate Thumbprint or Client Certificate – Must be assigned properly if mutual TLS is required.

Sometimes this error is thrown if one of these parameters is referenced in code but not initialized during runtime.

✅ 2. Client Certificate Setup in Azure Key Vault
If you're using Azure Key Vault to store and retrieve the signing certificate:

Make sure the Key Vault access policy allows the e-invoicing application access to both get and sign operations.

Ensure the certificate is enabled, has a valid private key, and is not expired.

In some cases, you must manually associate the certificate in Electronic Invoicing > Parameters > Certificates.

✅ 3. Logging & Debugging in LCS / Monitor Tool
Use the Electronic Invoicing Monitor to trace the action before the failure:

Navigate to Electronic Invoicing > Monitor > Execution logs.

Locate the failed submission and open the execution context.

Review input/output variables – see if any are empty or unexpectedly null.

Focus especially on the values coming into SendRequestAsync — a missing or empty access_token, baseUrl, or documentUuid could be the culprit.

✅ 4. Feature Versioning & Deployment
Verify you're on the latest version of the "Egyptian electronic invoice (EG)" feature, and it has been deployed and published in the correct environment:

After making changes to parameters or actions, publish and deploy the feature again.

Confirm the deployment status in the Electronic Invoicing Service environment in LCS.

✅ 5. Fallback: Custom Logging in Pipeline
As a last resort, you can temporarily extend the pipeline to include logging actions (e.g., Log action) before the failing step to pinpoint what’s null.

Final Tip:
If all else fails and everything looks perfect, it may be worth redeploying the entire Electronic Invoicing feature from scratch, as metadata corruption or partial deployments have been known to cause similar behavior.

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Holly Huffman 6,538 Super User 2025 Season 2 on at

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Good morning, afternoon, or evening depending on your location!

Based on the error details, it appears that the issue is related to a NullReferenceException occurring during the "Egyptian Tax Authority submit" action. This typically indicates that an object required for the request is missing or not properly initialized.
Recommended Troubleshooting Steps:

Verify API Credentials & Configuration:

Since you've already confirmed the client ID and secret, double-check that all required authentication parameters are correctly configured in the pipeline.

Ensure that the API endpoint URL is correctly set and accessible.

Check Azure Signed File Retrieval:

The error occurs right after fetching signed files from Azure. Confirm that the files are correctly generated and accessible.

Validate that the signing process completes successfully before submission.

Review Pipeline Setup & Dependencies:

Ensure that all required dependencies for the EgMyRestClientActionBase class are properly deployed.

Check if any missing configurations or updates are required for the latest Egyptian electronic invoice (EG) feature.

Enable Detailed Logging & Debugging:

Turn on tracing and debugging in the Electronic Invoicing feature to capture more details about the request failure.

Review logs for any additional error messages that might indicate missing objects or misconfigurations.

Hope this helps some!

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