Office 365 NLB/FW ports?

What are all the ports I need to allow through my Firewall, NLB and to my internal Exchange 2013 Hybrid CAS servers? For the purpose of migrating mailboxes and free/busy information etc?

I thought there were like 3?
Christian HansUndecided... Asked:
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Zephyr ICTCloud ArchitectCommented:
All the ports for Office 365 are mentioned and described on this page, you'll also find a range of IP-addresses/domain-names on which you could filter.

Migrating mailboxes need ports 80/443, in fact it's the most used combination of ports for the Office 356 services.

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