You will notice that the region name is appended by a number (ie. “-01”). You should expect that this number could change at any time in the future, and you should not have any hard dependencies or hard code the number appended to the region.
This wording needs some clarification and/or the article needs to be edited. This can be read two ways:
- An app service's default domain can be changed at any time and you cannot have any hard dependencies (includes CNAME records), making this change effectively useless for nearly all normal use cases utilizing custom domains.
- OR it just generically means, don't depend on app services deployed to the same region to use the same number. e.g. it could be eastus-01 or eastus-xx, however, an app service's domain will not change post-provisioning.
YutangLin, please clarify!
Microsoft