I'm working in a Salesforce instance with the Exact Target integration installed, and for some reason the unsubscribe, resubscribe and 'Send ExactTarget Email' links on the Contact do not work.
When either unsubscribe or resubscribe is clicked, I get the message:
"The connection to ExactTarget is currently unavailable. Try your request again later. if the problem persists,please contact your system administrator."
Calling Webservice method in the managed package from Execute Anonymous returns "connection error".
The administrator account I'm working in is also an administrator in ExactTarget, and thus should have all necessary permissions. I mention the error with the Send E-mail link because while it is different, it might be related. In that case I am taken to a page which says "Insufficient User Permissions," but again, as far as I can tell the account has full permissions, and is capable of sending e-mails from within ExactTarget.