Add troubleshooting and additional documentation on XMLA endpoints (#104

)

* Add troubleshooting and additional documentation on XMLA endpoints

* Added line about default semantic model

common/xmla-as-connectivity.md

@@ -14,11 +14,11 @@ applies_to:
 
 # XMLA / Analysis Services connectivity
 
-Tabular Editor uses the [AMO client library](https://learn.microsoft.com/en-us/analysis-services/amo/developing-with-analysis-management-objects-amo?view=asallproducts-allversions) to connect to the Power BI / Fabric XMLA endpoint, or instances of SQL Server or Azure Analysis Services (Tabular). Authentication and authorization is handled by the AMO client library, which means that Tabular Editor does not store any credentials or tokens. Moreover, users will need sufficient permissions to connect to the XMLA endpoint or Analysis Services instance. In most cases, this means that the user must be a member of the Analysis Services server administrator role, or have administrative permissions on the Power BI workspace.
+Tabular Editor uses the [AMO client library](https://learn.microsoft.com/en-us/analysis-services/amo/developing-with-analysis-management-objects-amo?view=asallproducts-allversions) to connect to the Power BI / Fabric XMLA endpoint or instances of SQL Server or Azure Analysis Services (Tabular). Authentication and authorization is handled by the AMO client library, which means that Tabular Editor does not store any credentials or tokens. Moreover, users will need sufficient permissions to connect to the XMLA endpoint or Analysis Services instance. In most cases, the user must be a member of the Analysis Services server administrator role or have administrative permissions in the Power BI workspace.
 
-In the following article, we will use the term "semantic model server" to mean the service accessed through the Power BI / Fabric XMLA endpoint, or any instance of SQL Server Analysis Services Tabular (SSAS) or Azure Analysis Services (AAS).
+In the following article, we will use the term "semantic model server" to mean the service accessed through the Power BI / Fabric XMLA endpoint or any instance of SQL Server Analysis Services Tabular (SSAS) or Azure Analysis Services (AAS).
 
-# Connection dialog
+## Connection dialog
 
 To connect to the semantic model server, go to **File** > **Open** > **Model from DB...**, or press **Ctrl+Shift+O**.
 
@@ -29,11 +29,11 @@ This will open the **Load Semantic Model from Database** dialog, where you can s
 
 ![Connect Dialog](~/images/connect-dialog.png)
 
-# Select database
+## Select database
 
 After you click "OK", Tabular Editor will connect to the semantic model server and retrieve a list of databases that you have access to. Select the database you want to work with, and click "OK".
 
-# Advanced Connection String Properties
+## Advanced Connection String Properties
 
 In all versions of Tabular Editor, you can specify an OLAP connection string in the **Server** textbox, rather than just the server name.
 
@@ -50,7 +50,7 @@ OLAP connection strings support many properties in addition to the ones shown ab
 
 In addition to the properties listed in the documentation, AMO connection strings also supports the following properties:
 
-## Locale Identifier
+### Locale Identifier
 
 You can specify the language to use for the connection by setting the `Locale Identifier` property. The value is a number that corresponds to a specific language. For example, `1033` corresponds to English (United States).
 
@@ -60,4 +60,93 @@ Provider=MSOLAP;Data Source=servername;Initial Catalog=databasename;Integrated S
 
 This is useful if you want error messages and other server messages to be in a specific language. If the `Locale Identifier` property is not specified, the language of the client operating system is used.
 
-Most Analysis Services instances supports several languages. See [this page for a full list of locale identifiers (LCID)](https://learn.microsoft.com/en-us/sql/relational-databases/system-catalog-views/sys-fulltext-languages-transact-sql?view=sql-server-ver16).
+Most Analysis Services instances support several languages. See [this page for a full list of locale identifiers (LCID)](https://learn.microsoft.com/en-us/sql/relational-databases/system-catalog-views/sys-fulltext-languages-transact-sql?view=sql-server-ver16).
+
+## Fabric/Power BI XMLA Settings
+
+Two admin settings must be switched on to enable the XMLA endpoint in Fabric/Power BI. 
+
+### Enable Tennant XMLA Endpoint 
+
+In the Fabric/Power BI admin portal, the integration setting "Allow XMLA endpoints and Analyze in Excel with on-premises semantic models" must be enabled
+
+At the tenant level, the setting may be restricted to only certain users. If the setting is restricted in your organization, ensure all required users are allowed to use the XMLA endpoint at the tenant level.
+
+![Tennant Admin Setting](~/images/common/XMLASettings/TennantAdminSetting.png)
+
+### Enable XMLA Read Write on Capacity
+
+To use the XMLA endpoint, the workspace that hosts a semantic model must be assigned to a capacity (FSku or Power BI Premium Per User), and the capacity must have XMLA ["Read Write" enabled in the capacity settings.](https://learn.microsoft.com/en-us/power-bi/enterprise/service-premium-connect-tools#enable-xmla-read-write)
+
+![Tennant Admin Setting](~/images/common/XMLASettings/CapacityAdminSetting.png)
+
+Read Write is enabled in the Admin Portal by navigating to 
+1. Capacity Settings
+1. Choosing the type of capacity
+3. Selecting the relevant Capacity
+4. Navigating to Power BI Workloads and scrolling down to find the XMLA Endpoint setting choosing "Read Write"
+
+## Additional Fabric/Power BI settings.
+
+### Disable Package Refresh
+
+If another user, other than the semantic model's owner, needs to edit the model through the XMLA endpoint, the security admin setting in Fabric/Power BI called "Block republish and disable package refresh" must be disabled.
+
+![Tennant Admin Setting](~/images/common/XMLASettings/DisablePackageRefresh.png)
+
+
+## Unsupported model types
+Several types of models do not support XMLA connections, [listed below](https://learn.microsoft.com/en-us/power-bi/enterprise/service-premium-connect-tools#unsupported-semantic-models). 
+
+The following semantic models aren't accessible by using the XMLA endpoint. These semantic models won't appear under the workspace in Tabular Editor or any other tool.
+
+- Semantic models based on a live connection to an Azure Analysis Services or SQL Server Analysis Services model.
+- Semantic models based on a live connection to a Power BI semantic model in another workspace. 
+- Semantic models with Push data by using the REST API.
+- Semantic models in My Workspace.
+- Excel workbook semantic models
+
+In Fabric, the default semantic model of a lakehouse or warehouse can be opened/connected to in Tabular Editor, but [not edited](https://learn.microsoft.com/en-us/power-bi/enterprise/service-premium-connect-tools#considerations-and-limitations)
+
+## Troubleshooting XMLA connections
+
+### Testing a simple connection
+
+These steps show how to most reliably connect to a Fabric/Power BI semantic model from Tabular Editor. 
+
+1. Connecting to a semantic model in Fabric is through the 'File' > 'Open' > 'Model from DB' (default shortcut Ctrl+Shift+O)
+
+2. You'll be presented with a dialogue (see below), and you need to put the Power BI connection string into the text box labeled 'Server'. Leave the rest of the options as configured in the screenshot (these are defaults). The connection string is in the form shown below. You can find this connection string in the Service (more details here in this [Microsoft doc in the sections 'Connecting to a Premium Workspace' and 'To get the workspace connection URL'](https://learn.microsoft.com/en-us/power-bi/enterprise/service-premium-connect-tools#connecting-to-a-premium-workspace)
+
+![Tennant Admin Setting](~/images/common/XMLASettings/LoadModelFromDatabase.png)
+
+Please copy and paste the connection string directly from the workspace rather than copying from somewhere/someone else or modifying it in any way.
+
+3. Depending on your machine (if your Windows login is linked to Entra ID or your identity provider) you may be prompted to log in. It's important that the account you use is the one with permission to the workspace. If your organization has multiple tenants or if you have multiple logins, this might not match your Windows login. You should use the exact credential that is shown in the Fabric web UI for your user.
+
+![Tennant Admin Setting](~/images/common/XMLASettings/AuthenticateToFabricPowerBI.png)
+
+4. After successful authentication, you'll be presented with a 'Choose database' dialog. Select one and click 'Ok'.
+
+![Tennant Admin Setting](~/images/common/XMLASettings/ChooseDatabase.png)
+
+### Multiple tenants
+If you've double-checked the user name and connection string as above and are still having issues, the next thing to check is whether adding the tenant GUID to the connection string helps. This might be an issue if you belong to multiple tenants.
+
+You can find the tenant ID directly in Power BI by clicking the top-right question mark and selecting 'About Power BI'. The tenant ID is shown as part of the 'Tenant URL'. Be careful, as the text box is typically too small to display the whole thing in the window in Power BI. Double-click on the URL shown, which will highlight the entire thing, that you can copy and paste.
+
+The whole URL is not the tenant ID. The tenant ID is the GUID at the end of the string, after "ctid=". So in the screenshot below, my tenant ID starts with "ddec", but yours will be different. Once you have the tenant ID, you can change the connection string that you used above: replace the part of the path that says "myorg" with your tenant ID. 
+
+An example is below. Your tenant ID and your workspace name will be different than those shown.
+
+Old: powerbi://api.powerbi.com/v1.0/myorg/WorkspaceName
+New: powerbi://api.powerbi.com/v1.0/eeds65sv-kl25-4d12-990a-770ca3eb6226/WorkspaceName
+
+Then, attempt connecting precisely as the instructions in the [Testing a simple connection section](#testing-a-simple-connection)
+
+
+### Duplicate names
+
+There can be issues connecting to a model if the workspace name is a duplicate of another workspace or if the model name is a duplicate name of another model.
+
+If there are duplicate names, please refer to Microsoft's documentation in the sections ["Duplicate workspace names" and "Duplicate semantic model name"](https://learn.microsoft.com/en-us/power-bi/enterprise/service-premium-connect-tools#duplicate-workspace-names) to learn how to modify the connection string to address these issues