Install Office 2016 is blocked

Forum|Forum|10 years ago
March 2, 2016
4 replies
23199 views

Hi All,

Being new at the forum I would like to ask a question.

We want to install Office 2016 from te the portal at portal.office365.com. This used to work, but since our webfiltering is turned back on again the installation is being cut off. We have tried to disabled Webfiltering, and then it works fine.

Now we want to look at log files about where the blocking is being done. But neither the URL nor the IP address is in the logging.

Does any of you recognize this and has a possible solution?

Regards, Hans

netmin

New Member

Hi and welcome to the forums (sometimes we're slow ... ),

as far as I know, MS has been adding more security features (like HSTS) to some of their Office servers. In case you are utilizing the full SSL inspection functionality, it might indicate that the Office installer now does a sort of HPKP (HTTP public key pinning) and doesn't like the MITM certificate provided by the Fortigate. If so, try exempting the MSOffice domains from webfilter inspection - or - switch to certificate-inspection only for applicable domains.