Block everything but office 365

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


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:

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.

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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