Update to Power Apps portals domain
If you provision a portal using the older portal add-on, the domain of your portal will be microsoftcrmportals.com. With the release of Power Apps portals, you can now update your Dynamics 365 domain microsoftcrmportals.com to the Power Apps portals domain powerappsportals.com.
Note
The microsoftcrmportals.com domain is deprecated and is limited only to the portals provisioned using the older portal add-on. In deprecation period, this feature will continue to work and is fully supported until it is officially removed. This deprecation notification can span a few years.
Go to Portal Actions > Update to Power Apps portal domain.

In Portal URL, enter the address of the website and select OK.

If you are already using the Power Apps portals domain and would like to revert to the old domain, you can use the Update to Power Apps portal domain action to revert to the old domain. In this case, the message is displayed as follows:
