Server aliases for Azure Analysis Services allow users to connect to an alias server name instead of the server name exposed in the Azure portal. This can be used in the following scenarios:
- Migrating models between servers without affecting users.
- Providing friendly server names that are easier for users to remember.
- Direct users to different servers at different times of the day.
- Direct users in different regions to instances of Analysis Services that are geographically closer, for example using Azure Traffic Manager.
Read about it in the Azure blog.