Users authenticate using Azure Active Directory (no onpremise Active Directory)
Migrate all users from abc.com to the new domain name: xyz.com
The company is planning to have a facelift in the brand name and thus change of domain name for all users. Wherein users AD properties should be updated from old domain name: abc.com to new domain name: xyz.com
Looking for Advice on what all to be considered for the migration or movement to occur?
And where is domain xyz.com located, the same tenant or another one? If it's the same tenant, you just need to change the UPN of the users. If its a new tenant, then you are on your own, as Microsoft doesn't provide any tenant-to-tenant migration tools. Your best bet would be to export the list of users and their attributes via PowerShell or the Graph API, then import them to the new tenant. Or look for 3rd party tools that do that.