please check, if Outlook via Citrix works.
If yes follow these Instructions:
please check local HOSTS-file
Dear colleagues,
please change your DNS to this setting until the end of the week:
10.213.252.108 autodiscover.ksb.com webmail.ksb.com
If you are using DNS forwarding, the new IP is already known to your network.
After having done this, we can switch your early adopters to the new 25 GB mail-boxes on exchange 2013.
Just add them to this list: http://moss.emea.ksb.intern/sites/ITCommercialFunctions/A-IT116/office_2013_survey/Lists/Exchange2013EarlyAdopters/AllItems.aspx
Thank you for your support and all the best,