Use same credential for EXO to connect to Msol and pull tenant details so that UnifiedGroups.xml can be stored per-tenant, useful for running against multiple tenants without copying script to separate folders for each one.
What about just using (Get-OrganizationConfig).Name or (Get-OrganizationConfig).Guid to uniquely identify the tenant? Connecting to Msol will add duration and will add a dependency we can possibly avoid.
That'll work too.
Resolved in #14
UnifiedGroups.xml is now UnifiedGroups-contoso.onmicrosoft.com.xml