Windows Machines in a SBS 2011 network can't seem to connect to the Exchange. When we open outlook we are prompted for username and password. Don't think anything changed with the server. Running Exchange 2010 SP3 Update Rollup 14
I replaced the firewall last night, things were fine.
I looked this morning, people are able to login using OWA but just not with outlook.
I tried setting up a new profile for a user, it does not find the account/server. Just keeps searching over and over
Event log errors:
Event ID: 12016 MSExchangeTransport
There is no valid SMTP Transport Layer Security (TLS) certificate for the FQDN of <servername.domainname.loc
al> The existing certificate for that FQDN has expired. The continued use of that FQDN will cause mail flow problems. A new certificate that contains the FQDN of <servername.domainname.loc
al> should be installed on this server as soon as possible. You can create a new certificate by using the New-ExchangeCertificate task
Event ID: 12015 MSExchangeTransport
Thumbprint : ojpoj23po54j23p4oj32pj2 An internal transport certificate expired.
These warnings and errors have been coming up in the event logs for a long time.
I believe they are related to the Exchange SSL Certificate including the host name of the server which is no longer valid / supported.
Again, the mail is flowing to OWA.
I can hit https://mail.companyname.com/owa
just fine. All mail is being delivered. Just can't use Outlook to connect.
The DHCP Server wasn't happy.
That was stopped
Google Update Service is stopped
Microsoft .Net Framework NGen v4.0 is stopped (x86) is stopped
Microsoft .Net Framework NGen v4.0 is stopped (x64) is stopped
I would usually think this is a problem with IIS.
An interesting item I noticed when setting up a brand new profile for a user is that when it prompts him for his login, it's prompting him for his full email address as the username versus the domain and username only for the domain.
Not sure if some how the authentication changed???
I am searching for anything else out of the ordinary.