emc offline access - test server connectivity failed.

Hi

we are using emc offline access  6.8  , and there are a number of users who have issues accessing their short cut emails.

they are able to access their emails via IE .

I ran a test on the emc offline access addon and the server connection failed for both worker servers. 

The only way we have found to remove the issues is to reimage the PC.

reinstalling the emc offline access does not resolve the problem.

Thanks

paul