URL Header rewrite question

The browser address bar depends on what links are followed as the page loads - I can only guess, but I expect that there is a redirect somewhere that redirects the page to xyz.apps.example.com, so that is what is shown in the browser address bar.

You need to add a Rewrite profile to rewrite xyz.apps.example.com to abc.example.com in http responses

https://techdocs.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/ltm-profiles-reference-13-1-0/2.html

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About Rewrite profiles

For environments that use web servers, you might want your websites to appear differently on the external network than on the internal network. For example, you might want the BIG-IP® system to send traffic destined for www.company.com/usa/ to the internal server usa.company.com instead. Normally, this translation could cause some issues, such as the web server expecting to see a certain host name (such as for name-based virtual hosting) or the web server using the internal host name when sending a redirect to client systems.

You can solve these problems by configuring a Rewrite profile, which causes the BIG-IP system to act as a reverse proxy server. As a reverse proxy server, the BIG-IP system offloads the URI translation function from web servers enabled with features such as Apache's ProxyPass module. With a Rewrite profile, the BIG-IP system can perform URI scheme, host, port, and path modifications as HTTP traffic passes through the system. The feature also provides reverse translation for the Location,Content-Location, and URI headers in the server response to the client.

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