Cisco – Office 365| Office 365 IP object range on a Cisco ASA

Glazenbakje's technical blog

It can happen that you need to configure an IP object range for office 365. I most cases this is because you have a policy that client users are not able to connect directly to the internet. Because of the company policy.

In case of the last option where you probably have blocked all http and or https traffic you need to exclude some ranges if you are using Office 365. This is because the office versions are not able to register or able to install on the client devices.

The fastest way to create this exclusion is to make an object-group with the networks ranges and hosts which Microsoft has written on their website.

On that website you can find the exception list back for Proxies and firewalls.

To continue the configuration on your Cisco ASA device. Below is tested on an ASA version 9.1.2 (ASA 5515-X)

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