can someone please help me understand why the "Create Topic" option is disabled on Azure portal? I am on a free trial and can create/use queue properly. Now I need to use Topic/Subscription but not able to create a topic. Please see below screen shot.
Topics are only available in Standard an Premium pricing tiers of an Azure Service Bus namespace, not the Basic tier.
In the Overview section of the Azure Service Bus namespace, click on Pricing Tier: Basic, and change it to Standard (or Premium).
NOTE: this change will have an effect on cost.
This answer is based on Joy's answer above, but with the updated user interface in the Azure Portal.
