VERY slow connecting Outlook 2007/10 to Office 365... only when logged onto Domain
OK, long title but sums it up I think.
I am having issues getting MS Outlook 2007 or 2010 to connect to our Office 365 system. At least, I'm only getting problems when I'm logging into the school domain.
If I try setting up Outlook on a home PC, it works like a charm. If I log into the machine locally whilst in the school, put in our proxy settings and try setting up Outlook ..... works like a charm.
However, if I log into the domain I get SERIOUS slowdown!! Connecting to an account can take up to 10 minutes!!
We are using ADFS for SSO and for Outlook Web Apps it's all working lovely, no issues at all. But, in order to migrate some things from our old email system I need to use .PST files in Outlook to act as the go-between.
I have added the CNAME of autodiscover to our DNS to point to autodiscover.outlook.com and practically anything else I can think of.
Anybody have some insights on what it might be? I have tried moving a computer account to an area of the AD with minimal GPO's applied and still get it.