Can not connect to Office Online behind firewall

In our office, we have Office 2007.  When trying to connect to Office Online for help, templates, etc, it can not connect.  To test the firewall, I tried it on our guest wireless, which is a completely separate network using different firewall rules.  I was able to connect.

This tells me it is a firewall issue.  The strange thing is, when connecting back into the internal network, anything that had a connected session with Office Online on the wireless can now connect but anything I had not connected to on the other network still can not.

for example:  I was on the wireless and connected to help and templates in Word.  I jumped back onto the internal connection and both help and word templates are still available.  I try Excel templates (which I did not access through the wireless) and it can not connect to Office Online.

I am thinking something was cached while on the wireless, so in an attempt to pinpoint the problem, clear IE cache and flush DNS.  I try again and and can still connect to what I could before.  

I have also checked the RSoP to see if anything in there could be effecting it but I do not see anything.

Thank you for your help!
mcwheesusAsked:
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SysExpertCommented:
Well it definitely sounds like a firewall or proxy server issue, and that needs to be resolved first.

Whether or not the info is cached or not is not relevant really, except for testing.

I hope this helps !
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mcwheesusAuthor Commented:
I agree, I think it is a firewall issue as well.  

Does anyone know what should be allowed in the firewall to allow office online traffic?  Please note that I can access Microsoft Office online resources via the web browser on all machines.
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SysExpertCommented:
I would turn on the firewall logging to see what is getting blocked and open accordingly

I hope this helps !
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mcwheesusAuthor Commented:
Thankyou I will give it a shot.
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mcwheesusAuthor Commented:
Update:  still troubleshooting.
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mcwheesusAuthor Commented:
I dont have access to the firewall and the person who does will be here next month.  I think it will be best for it to be troubleshot while that person is on site.  I dont want to leave this question open for that long.  

I am convinced it is a firewall issue.
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