Block everything but office 365

NethServer Version: NethServer release 7.8.2003 (final
Module: Web Content Filter

Hi,

I am having a problem with deny several users access to all internet except Office365 email/Online Exchange.

I have setup the users in a host group with their IP address, assigned them to a filter and then blocked everything except what is in the custom category. This is what I have there:

outlook.office.com
outlook.office365.com
smtp.office365.com
office365.com
office.com
office.net
r1.res.office365.com
r3.res.office365.com
r4.res.office365.com
protection.outlook.com

However the user is unable to use outlook to connect to the mail server. Anybody got any ideas or having similar issues?

Let me know.
Thanks
Andrew

I found the issue. I was blocking access to direct ip addresses and apparently this is required to get to the online exchange server.

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