After Exchange Server 2013 installation Outlook clients have "Connect using SSL only" disabled

Hi,

we have a customer that has implemented Exchange Server 2013 in a migration procces from Exchange 2007.

They have move some mailbox to Exchange 2013 and thier Outlook clients are configured with the opcin "Connect using SSL only" disabled. I know that the client is configured with autodiscover service of the Exchange Server but the question is, how can be configured in order the clients are configured to use HTTPS for connections

May 14th, 2015 3:43pm

You can enable it VIA Group Policy which is what I would recommend or if you want (not recommend since it's less secure) disable the requirement on the exchange side with the Set-RPCClientAccess cmdlet.

https://technet.microsoft.com/en-us/library/dd351072%28v=exchg.150%29.aspx?f=255&MSPPError=-2147217396

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May 14th, 2015 4:09pm

Hi,

In Exchange 2013, all Outlook connectivity (internal and External) takes place over Outlook Anywhere(RPC/HTTP):

http://technet.microsoft.com/en-us/library/bb123741(v=exchg.150).aspx

Please check the Outlook Anywhere settings in Exchange 2013:

Get-OutlookAnywhere | fl Identity,*auth*,*host*,*SSL*

We can configure the Outlook Anywhere by running the following command:

Set-OutlookAnywhere -Identity "Exch13\Rpc (Default Web Site)" -InternalHostname mail.domain.com -ExternalHostname mail.domain.com -InternalClientAuthenticationMethod Ntlm -ExternalClientAuthenticationMethod Basic -ExternalClientsRequireSsl $True -InternalClientsRequireSsl $true

Regards,

May 15th, 2015 5:50am

Hi Cristian,

Apart from the above suggested Server side changes, make the below client side change on Outlook to Enable "Connectusing SSL only" for all users.

Configure Outlook Anywhere settings for all users via Group Policy

By default Outlook Anywhere policy  settings are not included in the Group Policy template  file (Outlk12.adm).

Download and install the customization settings from here

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May 15th, 2015 6:23am

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