Before 2023
========
Email based discovery can be used to add a Store to the Workspace, using the email address instead of the Store URL. We could do this for on-prem Stores, even with Gateway.

However, this doesn't work for Cloud Customers where Workspace Service act as Storefront in Citrix Cloud and there is no Gateway. If we just point the SRV record (_citrixreceiver._tcp.domain) to the Cloud Store URL (domain.cloud.com), Workspace fails to add the store with a certificate error. We get the certificate error because Workspace tries to validate the email domain against the Store URL and they are different domains.


After 2023
=======
https://docs.citrix.com/en-us/citrix-workspace/global-app-config-service/configure-gacs-cloud.html#setup-email-based-discovery

Instructions

Before 2023
========

• Go to https://adsui.cloud.com/, and add the domain for which we want email based discovery to be enabled
• Once the Domain is verified, we can add a Workspace URL for the domain, as shown below 
• Add the same Store URL used for Cloud Store in this format - https://domain.cloud.com:443/citrix/store, as shown below.

Now when a User enters the email address to add a Store, Workspace sends a query to discovery.cem.cloud.us and Cloud returns the Store URL for the verified email domain. There is no need for SRV records anymore, like we needed for on-prem. This is a new service

After 2023
=======

https://docs.citrix.com/en-us/citrix-workspace/global-app-config-service/configure-gacs-cloud.html#setup-email-based-discovery


Note: This feature is supported on Workspace 2106 and later, which uses the Global App Config Service.
https://developer.cloud.com/citrixworkspace/server-integration/global-app-configuration-service/docs/overview