You try to activate a WILDCARD Certificate for IMAP or POP Services for Exchange 2010.
Either GUI or Powershell this does not work as wanted:
| Enable-ExchangeCertificate -Server ‘ exchange2010’ -Services ‘IMAP, IIS, SMTP’ -Thumbprint ‘C22E2AE9FC07C7DA55454522B0E0ACF996C8’ | 
 ERROR:
		
This certificate with thumbprint C22E2AE9FC0646473449422B0E0ACF996C8 and subject ‘*.butsch.ch’ cannot used for IMAP SSL/TLS connections because the subject is not a Fully Qualified Domain Name (FQDN). Use command Set-IMAPSettings to set X509CertificateName to the FQDN of the service.
Solution:
		
Is to set the parameter with SET-POPSETTINGS and set-IMAPSETTINGS:
Set-POPSettings -X509CertificateName exchange2010internalname.butsch.ch
Set-IMAPSettings -X509CertificateName exchange2010internalname.butsch.ch
Restart the services:
		
restart-service MSExchangePOP3
restart-service MSExchangeIMAP4
Check what you changed:
		
Get-popsettings
Get-imapsettings
Technet Links:
 
 
Exchange 2010
https://technet.microsoft.com/de-de/library/bb691401(v=exchg.141).aspx
		
For Exchange 2013:
If you want this active FROM External (Which we don’t recommend!) on your 2013 don’t forget to set these parameters:
Set-POPSettings -ExternalConnectionSetting {mysamplenamethirdleveldomain.butsch.ch:995:SSL}
Set-ImapSettings -ExternalConnectionSetting {mysamplenamethirdleveldomain.butsch.ch:993:SSL}
https://technet.microsoft.com/en-us/library/jj657728(v=exchg.150).aspx
		
Exchange 2013 Log Options:
https://technet.microsoft.com/de-de/library/aa997690(v=exchg.150).aspx
		
Done forget to enable (Turn to automatic) the POP or IMAP3 Service and start it


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