The solution in this scenario would be to add the required font as a private font to the application. The font files (including all font variations used in the report) needs to be added to the application that exports reports and also referenced in privateFonts element in Telerik.Reporting configuration section in application configuration file.
For more detailed instructions on adding the font as a private font and examples please check https://docs.telerik.com/reporting/configuring-telerik-reproting-privatefonts.
An important note is that GDI calls required for handling private fonts are blocked in Azure App Services. Therefore, our recommendation is to use Cloud Service plan in case private fonts are required. Please refer to this feedback request - PrivateFontCollection is not working.
Let us know if you need any additional information.
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