- You cannot access the conversation history.
- You cannot search the address book.
- An Exchange Server connection error notification appears the lower-right corner of the Lync client. Specifically, you see the "EWS not deployed" status for EWS Information in Lync Configuration Information.
- If Microsoft Outlook is not started, you may receive the following error message from Lync client:Lync cannot connect to the Exchange server. Please try signing out and signing back in. Outlook contact and calendar information will be unavailable until the connection is restored.
For more information about how to upgrade Exchange Server 2007 to Exchange Server 2013, go to the following Microsoft website: