Email Subsciption not available in SSRS

Hi @Nikko Zurawski ，
First of all, make sure that you have completed configuring the mail setting options in the report manager, as shown below:

Be sure to restart the server when the settings are complete:

Based on the current information, it seems that the E-mail Delivery extension is disabled in the RSreportserver.config file. To avoid the issue, please refer to the following steps:

1.Navigate to <Drive>:\Program Files\Microsoft SQL Server Reporting Services\SSRS\ReportServer folder, open the RSReportserver.config file.
2.Check whether the following <Extension> element is in the <DeliveryUI> configuration in the RSreportserver.config file:

</Extension>  
 <Extension Name="Report Server Email" Type="Microsoft.ReportingServices.EmailDeliveryProvider.EmailProvider,ReportingServicesEmailDeliveryProvider">  
 <MaxRetries>3</MaxRetries>  
 <SecondsBeforeRetry>900</SecondsBeforeRetry>  
 <Configuration>  
 <RSEmailDPConfiguration>  
 <SMTPServer></SMTPServer>  
 <SMTPServerPort>  
 </SMTPServerPort>  
 <SMTPAccountName>  
 </SMTPAccountName>  
 <SMTPConnectionTimeout>  
 </SMTPConnectionTimeout>  
 <SMTPServerPickupDirectory>  
 </SMTPServerPickupDirectory>  
 <SMTPUseSSL>False</SMTPUseSSL>  
 <SendUsing>2</SendUsing>  
 <SMTPAuthenticate>0</SMTPAuthenticate>  
 <SendUserName></SendUserName>  
 <SendPassword></SendPassword>  
 <From></From>  
 <EmbeddedRenderFormats>  
 <RenderingExtension>MHTML</RenderingExtension>  
 </EmbeddedRenderFormats>  
 <PrivilegedUserRenderFormats>  
 </PrivilegedUserRenderFormats>  
 <ExcludedRenderFormats>  
 <RenderingExtension>HTMLOWC</RenderingExtension>  
 <RenderingExtension>NULL</RenderingExtension>  
 <RenderingExtension>RGDI</RenderingExtension>  
 </ExcludedRenderFormats>  
 <SendEmailToUserAlias>True</SendEmailToUserAlias>  
 <DefaultHostName>  
 </DefaultHostName>  
 <PermittedHosts>  
 </PermittedHosts>  
 </RSEmailDPConfiguration>  
 </Configuration>  
 </Extension>  

3.If not, please make a copy of the RSreportserver.config file, and then add the above element between the two <DeliveryUI> attributes.
4.Save the file.

For more information, please refer to : RsReportServer.config Configuration File

Here is a very detailed tutorial to help you understand: Configure email notifications for Configuration Manager reports.
Best Regards,
Joy

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