O365 running slowly/not working

[sluggster66]

Hi everyone

 

Having an issue with o365 at the moment.

 

Our filtering is done through a Dell NSA 4600. Our o365 is using a Microsoft domain @e.......onmicrosoft.com

 

Once a user has logged into the portal, if they click on one drive or any of the other apps ( exchange for example) it takes an age for them to load if they load at all.

 

If have tested a PC that bypasses our firewall and it all works fine.

 

I have changed the MTU settings on our sonicwall but this has made no difference.

 

Any help would be really appreciated

 

Simon

[rama1712]

You might need to get who ever to change and update the IPs and url that MS use we had exact same problem here and at a few other schools or LA comms team updates records from links below and know all is well

 

Ip and URLs

 

https://technet.microsoft.com/en-us/library/hh373144.aspx

 

Ports

 

https://technet.microsoft.com/en-us/library/hh852522.aspx

 

Thanks