Exchange 2013 shows strange name on Outlook Connection Status

We upgraded from Exchange 2007 to Exchange 2013. Everything seems to be working without an issue now. On Outlook connection Status however we see strange Server name, it is GUID of somekind. Attachment shows more info.

Question is, do we need to worry about this? Proxy server shows just right.
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Mohammed KhawajaConnect With a Mentor Manager - Infrastructure:  Information TechnologyCommented:
This is normal.  It is explained in link

Microsoft Outlook clients no longer connect to your servers fully qualified domain name like they used to. Outlook uses the Autodiscover service ( and the A record you create in DNS pointing to your CAS server ) to connect to your Exchange 2013 server. this is displayed as the mailbox GUID of the user, the @ symbol, and your domain name of the user’s primary SMTP address.  So do not think that this is a problem, it is in fact by design.
Tino BaerholdCommented:
He was asking for the server names in Outlook connection status NOT in the mailbox configuration.
This is not the mailbox GUID. Someone help please.
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