Security Certificate Alert opening Outlook 2013

We recently installed a new Exchange 2013 server that is currently coexisting with the Exchange 2010 server.  A test mailbox was moved over to the 2013 database successfully but when that mailbox is access through the Outlook client a security alert pops up.  What do I need to do so this alert  does not continue to popup?

Security-alert.png
NytroZAsked:
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ReneD100Commented:
I assume you created a self-signed certificate? You need to import that on the machine and add it to the 'trusted root certification authorities'
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NytroZAuthor Commented:
I have not created a self signed certificate. Does the certificate need to be imported on the exchange server or the Outlook client workstation?
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ReneD100Commented:
Exchange will already have the certificate and created it during installation. You can export if  from IIS and then import it on the workstations. Or you can obtain a 'real' certificate and install that on the Exchange server. In that case the client PCs do not need any certificate installation.
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