Mirroring topics

Sharepoint lists mirroring issue

Gllme — Fri, 04 Sep 2026 10:01:19 GMT

Hello,

We currently face an issue with sharepoint lists mirroring in microsoft fabric and we have no clue what can happen because the error message is pretty useless :

In fact, we are mirroring more than 20 lists but only half of them succeed. The others failed with the following error :

Internal system error occurred. ArtifactId: daa35143-...-5aa6accfec68, SequenceNumber: 9

I have linked an eventhouse but the error message is still the same, no more information:

Internal system error occurred. ArtifactId: daa35143-...-5aa6accfec68, SequenceNumber: 9

How can I have more information about the issue ?

Thank you very much for your help,

Regards

Sharepoint lists mirroring issue

Gllme — Fri, 04 Sep 2026 09:29:51 GMT

Hello,

We currently face an issue with sharepoint lists mirroring in microsoft fabric and we have no clue what can happen because the error message is pretty useless :

In fact, we are mirroring more than 20 lists but only half of them succeed. The others failed with the following error :

Internal system error occurred. ArtifactId: daa35143-...-5aa6accfec68, SequenceNumber: 9

I have linked an eventhouse but the error message is still the same, no more information:

Internal system error occurred. ArtifactId: daa35143-...-5aa6accfec68, SequenceNumber: 9

How can I have more information about the issue ?

Thank you very much for your help,

Regards

Mirroring SQL Endpoint Capacity Usage

FabricEnjoyer — Mon, 17 Aug 2026 11:19:29 GMT

Hi All,

I've been working extensively with the Open Mirroring Database item in Microsoft Fabric, but I'm still trying to fully understand how its capacity (CU) consumption is calculated.

From my understanding, the internal operations include components such as:

OneLake Write via Redirect
OneLake Iterative Read via Proxy
OneLake Read via Redirect
OneLake Read via Proxy
OneLake Write via Proxy
OneLake Other Operations

My assumption is that these workloads account for activities such as data ingestion, CSV-to-Parquet conversion, data maintenance, vacuum operations, and other background processing required to keep the mirrored database operational.

What I do not understand is the Warehouse SQL Endpoint Query Usage metric.

On 11 August, this metric increased dramatically in our environment and has remained significantly elevated ever since. For one particular Open Mirroring Database item, usage increased from approximately 7K CU to 34K CU, and I am trying to determine what contributes to this workload and why it changed so suddenly.

Before: Screenshot

After: Screenshot

Another observation is related to the Run By filter in the Capacity Metrics App.

Prior to 10 August, I was able to filter consumption by individual user identities and clearly distinguish activity generated by specific users from activity generated by the system.

However, from around 10/11 August, all user-generated activity appears to be grouped under a generic "User" identity, and individual users can no longer be distinguished or filtered.

Before 10 August: Screenshot showing identifiable users

After 10 August: Screenshot showing only "User"

I don't understand what this new User identity represents. Is it an aggregation of all user-generated activity, a new classification introduced by the metering changes, or something else entirely?

My current theory is that both the increase in Warehouse SQL Endpoint Query Usage and the change in the Run By filter may be related to the recent Fabric capacity metering changes, but I have not been able to find any documentation that clearly explains this behavior.

Can anyone provide insight into the following?

What specifically contributes to Warehouse SQL Endpoint Query Usage for an Open Mirroring Database?
Do any of the internal mirroring processes execute through the SQL Endpoint and therefore appear under this metric?
Did the recent Fabric metering changes alter how these operations are classified or billed?
What exactly does the "User" identity represent in the Run By filter?
Why did individual user identities disappear after 10 August and become a generic "User" value?
Is the new User Identity dimension connected to the recent metering changes?
Has the attribution model for user-generated workloads changed, resulting in individual users being grouped into a single category?

Any clarification would be greatly appreciated, as these changes make it difficult to understand capacity consumption patterns and compare usage before and after 10 August.

Thanks!

Sharepoint list mirroring

Michal_Tyl — Thu, 28 May 2026 10:39:25 GMT

Hey,

As I set up the basic SharePoint list, mirroring most of the data comes through without a problem.

The issue is the fields categorized as User/Group type. (for example: Modified by / Created by fields in SharePoint lists)

They don't seem to return the values, as they are nested data structures that mirroring just skips instead of giving the option to flatten them.

Deep dive on open mirroring

pmscorca — Fri, 15 May 2026 12:59:44 GMT

Hi,

I would like to better understand which mechanisms, services and functions are behind the operation of open mirroring to better understand the added value compared to an ingestion via f.e. pipeline.

Any helps to me, please? Thanks

Mirrored Dataverse in Fabric

pmscorca — Thu, 14 May 2026 15:27:36 GMT

Hi,

in Fabric does it exist any native item to implement a Mirrored Dataverse to read/get data from this storage?

A such feature could be very useful.

Many thanks

Open mirroring versus Dynamics 365 CRM

pmscorca — Thu, 14 May 2026 09:14:34 GMT

Hi,

is it possible to implement an open mirroring to read/get data from a Dynamics 365 CRM solution?

Many thanks

Mirror replication Premium extremely high consumption issue

DSZ — Thu, 09 Apr 2026 09:00:20 GMT

Dear Community,

We have switched on the CDF opportunity on 1-2 Mirrored database. We have noticed 30% minutes later we are almost knocked out the F32 license fully.

We have on it extremnely small data. 10-20K records. Even the size is small also. Just rising to the sky without no reason. On the dev we have 20 table with 3K records....

Mirrored SharePoint List (Preview) - “Failed to get document libraries” Error 404

thaisstefani18_ — Fri, 27 Mar 2026 16:22:07 GMT

Hello everyone,

I’m exploring the Mirrored SharePoint Online List (preview). I ran a test with a small list and it has been replicating changes correctly. However, I keep seeing the error 'led to get document libraries. Request failed with status code 404, x-ms-root-activity-id: …' on the screen.

Could this be happening because the feature is still in preview?

Thank you

Oracle Mirroring - Invalid Identifier Error

apitcher11 — Tue, 24 Mar 2026 19:50:57 GMT

I am trying to mirror from an on-prem Oracle DB, and one of the tables I need gives me the following error:

SourceErrorCode: ReplicationError: Failed to do initial data load for table <TableName> due to 'ORA-00904: "SYS_NC00112_": invalid identifier', ErrorCode: InputValidationError"

I know this is an invalid column header error, and I tracked down the issue to a hidden system generated column named, "SYS_NC00112$". They're similar, but the column name in the error message has the dollar sign replaced with an underscore. Is this a special character limitation with the dollar sign? Is there any way around this?

Mirroring from on-premise PostgreSQL and MySQL sources

pmscorca — Mon, 23 Feb 2026 10:30:19 GMT

Hi,

in order to get/read data from on-premise PostgreSQL and MySQL sources, will these features be implemented?
I want to highlight on-premise source concept.

Thanks

Fabric SQL Server mirroring - fails on time-out

StanislavPtacek — Thu, 12 Feb 2026 09:05:42 GMT

I have encountered issues when mirroring large tables (2.5 billion records and more) from SQL server 2022 using the Fabric mirroring through on-prem data gateway. The issue seems to be a time-out which is enforced after 4 hours of the initial load running. On Fabric side I can only see "Internal system error occured"

but on the data gateway side I can see it is actually time-out which seem to line-up to a 4 hour window:

Has anyone experienced this before? Is there a solution? I haven't found anyhing on the gateway side of things to help.

Is it possible to Mirror Azure SQL via VNet Gateway with Workspace Identity?

AndrewDMay — Mon, 02 Feb 2026 21:40:02 GMT

I'm trying to do a first test of mirroring one of our databases that is private within our Azure Network.

I have created a VNet Data Gateway, assigned the Workspace Identity the necessary permissions in Azure SQL, but when trying to create a connection, either from the Mirroring Wizard or Manage Connections and Gateways, it doesn't appear to be possible to createa combination of the VNet Data Gateway and Workspace Identity.

I couldn't see this listed as a known issue or limitation anywhere, but I'm assuming that it currently is?

I'm going to try out Service Principal authentication as that appears to be the next least-bad option, but that will break when the secret expires. We don't generally allow SQL Logins to our servers.

Issue with mirroring on-prem sql db with user defined datatypes.

chetanhiwale — Thu, 29 Jan 2026 10:50:35 GMT

Hi Folks,

I am trying to mirror an onprem sql managed instance to Fabric. The sql managed instance has some user defined datatypes. As Fabric docs says it doesnt supports user datatypes but when tested ( as of Jan 2026 ) , if the column is not a primary key column it works , else it throws an error.

Can someone confirm on this, if userdefined datatypes are supported or not ?
Docs ref : https://learn.microsoft.com/en-us/fabric/mirroring/azure-sql-managed-instance-limitations#column-level

Thanks

The database cannot be mirrored to Fabric due Data Factory disabled

richard-aik — Wed, 14 Jan 2026 05:09:24 GMT

I was trying to setup On prem SQL mirroring in a development Workspace but was given error messages below:

New SQL Mirror:

The database cannot be mirrored to Fabric due to below error: Test connection failed. Data Factory 801d6d4c-9d6f-4126-924d-8cae3d820a7e is in state Disabled. The requested operation is not permitted. Activity ID: 3a8b4029-9bed-45cf-9339-503a36b70625

Choose Data:

Data Factory 801d6d4c-9d6f-4126-924d-8cae3d820a7e is in state Disabled. The requested operation is not permitted. Activity ID: b7188a47-b26f-43d9-9bda-28f581c2c26f Refresh or troubleshoot the issue.

I went digging around with fab-cli command, but dont think that shows Data Factory <uuid> for me to debug further. Any suggestions to solve this issue is appreciated. I managed to create the SQL mirror in my other workspace.

Another strange behavior I found in this workspace is when i tried to create an item "Copy Data". I will get thrown with different error.

Create item "Copy Job"

{"message":"Request failed with 400(Bad Request): {\"error\":{\"code\":\"FactoryOperationNotPermitted\",\"pbi.error\":{\"code\":\"FactoryOperationNotPermitted\",\"exceptionCulprit\":1}}}, \nrequestid: 41e8edb5-b0cb-8c2b-4c7b-93f7d2ee24eb"}

Thanks & Regards,

Richard

Best practice to name a mirrored db respect to the environment

pmscorca — Thu, 11 Dec 2025 17:41:59 GMT

Hi,

I usually name a workspace including a suffix (or prefix) to refer the environment (e.g. ws_xxx_dev, ws_xxx_test, ws_xxx_prod), while for the related objects (lakehouse, warehouse, pipeline, dataflow gen2, semantic model, and so on) I don't specify a such suffix or prefix.

Now, which is the best practice to name a mirrored db (f.e. from a SQL Server source)? Can I avoid to specify the environment reference?

Thanks

Renaming the connection for a mirrored SQL database

pmscorca — Wed, 10 Dec 2025 17:35:52 GMT

Hi,

in Fabric is it possible to rename a SQL Server connection already used for a Mirrored SQL database, without recreate the mirroring?

Many thanks

Moving Mirrored SQL database between workspace

pmscorca — Wed, 10 Dec 2025 16:46:22 GMT

Hi,

I need to maintain a Fabric data platform solution having a Mirrored SQL database in the wrong workspace, and so I need to move it to another ws.

I'd like to accomplish a such task avoiding to operate in SQL Server simply using the existing SQL Server connection in Fabric.

Any helps to me, please? Thanks

Deployment pipeline limitations about mirroring

pmscorca — Wed, 03 Dec 2025 18:17:52 GMT

Hi,

I need to implement a SQL Server mirroring and I'd like to know if there are any limitations for deployment pipelines in order to deploy a such feature between environments.

I've read that the related SQL analytics endpoint cannot be deployed by a deployment pipeline yet.

Many thanks

Error in Mirrored google Big query

Anonymous — Mon, 22 Sep 2025 12:19:45 GMT

Hi,

Q1. I am trying to mirror tables in GCP Big Query, once I set up everything its giving below error.
I couldn't find any specific error message.

Q2. Our data has 15 tables few crore rows in each. Is it better to use Mirrored google Big query or a custom pipeline which will do CDC per day basis to optimize cost from both GCP and Fabric perspective?
Any help will be appreciated.