## 5.5.3  Prepare Access to the SAP Event Mesh Application
SAP Event Mesh is a software as a service (SaaS) application that allows your authorized business users to manage queues and webhooks. It also allows them to view the connection rules and service descriptor that you provided when you created a service instance. For more information, see Using Event Mesh in the SAP Event Mesh documentation.
##  Tip
Only a security administrator of the subaccount can perform the steps in this section. For detailed information on defining your security administrators, see the section Define Subaccount Administrators [page 33] in this guide.
## Step Task
1. Subscribe to the Event Mesh application:
Go to the subaccount in which you subscribed to SAP Event Mesh and SAP Subscription Billing. Choose Services Service Marketplace in the navigation panel.

2. You see all the services that are available to you.
Search for and select the service Event Mesh .

3. Under Application Plans , display the action menu of the plan for which you want to create a subscription and choose Create .

##  Note
In this guide, we use the standard plan for the example.
## Step Task
4. Check the basic info and then choose Create .
5. The creation process starts. Choose View Subscription to switch to the Instances and Subscriptions screen.
6. You're subscribed to the Event Mesh application.
7. Now give your users access to the application:


In your subaccount, choose Security Role Collections in the navigation panel. Then filter by 'Enterprise Messaging' (former name of Event Mesh).
You see the standard role collections for Event Mesh.

For details on the Event Mesh roles, see Assign Roles to Users in the SAP Event Mesh documentation.
## Step Task
8. Assign your users to the standard role collections according to the necessary authorizations. For example, assign administrators to the collection 'Enterprise Messaging Administrator".
9. Follow the steps described in Assign Role Collections to Users or User Groups [page 40]. If the standard collections are not sufficient, you can also create your own role collections for Event Mesh. See Build Role Collections [page 35] for instructions.
3. 10.
4. To access the application, return to the overview of your subaccount and choose Services Instances and Subscriptions . In the list of subscriptions, choose the Go to Application icon of Event Mesh.

##  Note
Only the business users that you authorized in the previous step can access the application.
11. The SAP Event Mesh application displays.
You will see a tile for each Event Mesh instance of plan DEFAULT from your subaccount.
To continue, select the tile for your messaging client.
You will see the settings for this messaging client. You can then define queues or webhook subscriptions and display further details.
You need a webhook subscription if you want to receive the events via a push mechanism. The Event Mesh service calls your registered endpoint (webhook URL) via a HTTP post request with the event payload.
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