Initiate a role switch or failover on a tenant database to force the primary and mirror databases to change their roles.
You must have the AlterTenantMirroring privilege.
The primary and mirror databases must be running.
The primary database stops and then restarts as the mirror database, resulting in dropped connections. Connections to scale-out database copies and the mirror database that becomes the primary database are not affected.
The primary database (the read-write database copy) becomes the mirror (a read-only database copy), and the mirror database becomes the primary, transferring ownership of the read-write database copy.