Why "create topic" option is disabled on azure portal?

Question

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.

Incidence

Answer 1

Navigate to Scale in the portal, change messaging tier to Standard, it will be able.

Coz

you hit the bulls eye, thanks a lot. Just a question, will updating from Basic to Standard affect my azure subscription (e.g billing or something else?) as I am using a free trial for now. – Incidence

@V.P.Verma I think yes, they have different prices, i.sstatic.net/T7RS5.png, refer to : azure.microsoft.com/en-us/pricing/details/service-bus – Coz

As always, Azure Portal is constantly evolving. Settings/Scale seems to be removed. Scaling option can be done from Overview. – Lanai

Answer 2

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.

Magnesite

Given that the Portal UI is now different this answer should now be the correct/accepted one. – Chromatogram