Exchange server OWA athentication Error " You must set a default domain if LogonFormat is set to UserName"

Question

I Have windows 2012 DC installed and This is a production server, I know that Its not recommended to install exchange server on the DC. I had to do it because of management instructions.
I have tried to install the exchange 2013 and received many errors at the time of installations and then finally I changed the path for installation to D drive. its installed successfully.
The issue is its not opening the OWA or ECP.
The owa virtual directory got deleted as part of troubleshooting to recreate it. but after that its not creating, I reset the iis and created the virtual drive for owa from the iis console but not through powershell and then i thought to install the SP1
so that it can be fixed.
At the time of installation client access front end service role ..it gives error
Error:
The following error was generated when "$error.Clear();
          $FEOWAVdirIdentity = $RoleNetBIOSName + "\OWA (Default Web Site)";
          $FEOWAVdir = get-OwaVirtualDirectory -Identity $FEOWAVdirIdentity -DomainController $RoleDomainController;
          if ($FEOWAVdir -ne $null)
            Set-OwaVirtualDirectory -Identity $FEOWAVdir.Identity -ExternalUrl $FEOWAVdir.ExternalUrl -InternalUrl $FEOWAVdir.InternalUrl -ExternalAuthenticationMethods $FEOWAVdir.ExternalAuthenticationMethods
-BasicAuthentication ([Convert]::ToBoolean($FEOWAVdir.BasicAuthentication)) -WindowsAuthentication ([Convert]::ToBoolean($FEOWAVdir.WindowsAuthentication)) -DigestAuthentication ([Convert]::ToBoolean($FEOWAVdir.DigestAuthentication)) -FormsAuthentication ([Convert]::ToBoolean($FEOWAVdir.FormsAuthentication))
-LiveIdAuthentication ([Convert]::ToBoolean($FEOWAVdir.LiveIdAuthentication)) -OAuthAuthentication ([Convert]::ToBoolean($FEOWAVdir.OAuthAuthentication));
        " was run: "You must set a default domain if LogonFormat is set to UserName.".

Answer 1

Hi Mohammed,
I have run into this same problem and below is the fix.
Run below command  to see the logon format
Get-OwaVirtualDirectory -Identity "owa (Default Web Site)"|fl name,server,*auth*,*logon*,*domain*
Look for LogonFormat values 
LogonFormat                             : UserName- (Wrong One)
LogonFormat                             : Domain - (Correct one)
If you find the first one (Wrong One) then i would suggest you to run the below command to change the log on format to domain which will solve your problem
Set-OwaVirtualDirectory -Identity "owa (Default Web Site)" -LogonFormat FullDomain
Cheers !!
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