Setting the hostname for links in generated emails

Edge automatically sends emails in response to certain events as described in Customizing Edge email templates.

Many of these emails contain a link. For example, when a new user is added to an organization, the Edge UI sends the user an email containing a login URL in the form:

https://domain/login

The domain is determined automatically by Edge and is typically correct for the organization. However, there is a chance that when the Edge UI is behind a load balancer that the automatically generated domain name is incorrect. If so, you can use the conf_apigee_apigee.emails.hosturl property to explicitly set the domain name portion of the generated URL.

To set the domain:

Open the ui.properties file in an editor. If the file does not exist, create it:
```
vi /opt/apigee/customer/application/ui.properties
```
Set conf_apigee_apigee.emails.hosturl. For example, set conf_apigee_apigee.emails.hosturl as:
```
conf_apigee_apigee.emails.hosturl="http://myCo.com"
```
Save your changes.

Make sure the properties file is owned by the 'apigee' user:

chown apigee:apigee /opt/apigee/customer/application/ui.properties

Restart the Edge UI:

/opt/apigee/apigee-service/bin/apigee-service edge-ui restart