When creating a mailbox, you can check after the directory replication process has completed that the remote mailbox located ...

When creating a mailbox, you can check after the directory replication process has completed that the remote mailbox located in your %BRAND_OFFICE_365_SHORT% organization has been successfully created by verifying the mailbox properties. To do this, navigate to the Recipient node in the EMC for the on-premises organization and sign in to %BRAND_OFFICE_365_SHORT%. Then, navigate to the %BRAND_OFFICE_365_SHORT% %BRAND_ADMIN_CENTER_PREVIEW% and select Users. The user mailbox should be available and configurable.