In your company, the end-users access Azure virtual desktop from personal devices. The support desk reports a significantly high number of calls because the users get trouble with connecting to their published RDS feed due to mistyped feed URLs. 
Which of the following steps would you take?

Answer options:

A.Add a CNAME record in DNS
B.Add a new TXT record in DNS
C.Add a new AAA record in DNS
D.Create a new URL with a URL shortener
E.Create a Host record in DNS

Correct Answer: B 
You should publish the feed URL for email discovery by creating a new TXT record with the host _msradc and the text rdweb.wvd.microsoft.com/api/arm/feeddiscovery.
Option A is incorrect. Adding a CANME in DNS will not resolve the issue.
Option B is correct. You need to set up email discovery by adding a new DNS record with properties host, text, and TTL.
Option C is incorrect. You need to add a TXT record, not a AAA record in DNS.
Option D is incorrect. Creating a new URL with a URL shortener is not the best solution to the given problem.
Option E is incorrect. Creating a Host record in DNS is not the right solution.
Reference: 
To know more about how to Set up email discovery to subscribe to your RDS feed, please visit the below-given link: 

https://docs.microsoft.com/en-us/windows-server/remote/remote-desktop-services/rds-email-discovery?WT.mc_id=AZ-MVP-5004159