zxing generate qr code c# Figure 5-17 Outlook 2010 flags a problem with a self-signed certificate. in Visual C#

Generation QR Code ISO/IEC18004 in Visual C# Figure 5-17 Outlook 2010 flags a problem with a self-signed certificate.

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Figure 5-17 Outlook 2010 flags a problem with a self-signed certificate.
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5 Exchange Management Console and Control Panel
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root certificate store of computers that are not part of Active Directory and that need to communicate with Exchange. Windows PKI certificates are more manageable than selfsigned certificates and are also free, so they are an acceptable solution for small to medium deployments. From this discussion, you can see that the best solution for almost all deployments is to use a commercial certificate bought from a reputable, third-party trusted, CA that takes the responsibility to issue and ensure the validity of certificates. These certificates are obviously more expensive, but they offer a major advantage because the issuer s CA certificates are usually already installed in the trusted root certificate store of client computers, meaning that you don t have to install certificates manually before devices can connect. The Exchange 2007 version of EMC doesn t provide any UI to deal with certificates, so EMS is required whenever you need to work with certificates. This isn t a problem if you re used to the nomenclature and parameters used with certificates, but can be offputting if you don t work with certificates often. Exchange 2010 provides the UI to view the certificates assigned to servers and wizards to create new certificates and assign the certificates to Exchange services (OWA, ActiveSync, and so on) with the Exchange Certificate Wizard. Click the Server Configuration node and select a server to see the certificates that are assigned to the server. In the example shown in Figure 5-18, you can see that the certificate is selfsigned, meaning that this is the certificate that Exchange automatically generates when a server is installed.
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Figure 5-18 Viewing the certificate installed on a server.
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There are a number of ways to work with certificates. You can do any of the following:
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Assign services to a certificate: This option allows you to assign one or more services to a certificate. The Assign Services to Certificate Wizard (Figure 5-19) presents the set of services that already use the selected certificate and allows the administrator to assign the certificate to any other service that does not already use the certificate. As you can see, in this case, Unified Messaging is the only service that can be assigned to the certificate. Renew an Exchange certificate: This option renews a self-signed certificate for a further five-year period and assigns it to the services that use the existing certificate. Clients will have to import the newly extended certificate to avoid seeing prompts about its potentially untrusted status. Request a new Exchange certificate: This option allows you to create a request that is later sent to a Windows or commercial third-party CA that will generate the necessary certificate to meet the requirements gathered by the wizard. The certificate is brought into Exchange with the Complete Pending Request option, where you give Exchange the name of the certificate file generated by the CA to allow it to import the certificate. Import an Exchange certificate: This option is used when a company has general certificates that are used for other services in addition to Exchange. You provide the name of the file containing the certificate and its private key and Exchange imports it.
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Figure 5-19 Assigning a certificate to services.
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5 Exchange Management Console and Control Panel
The New Certificate option invokes a wizard (Figure 5-20) to do all of the work to gather requirements for a new certificate that can be used by the Exchange services and generates a certificate request in the form of an encoded file that can be provided to a CA. After the new certificate is available (Figure 5-21), it can be imported into Exchange with the Complete Pending Request option and then assigned to the services that need to use it. Planning for the deployment and use of certificates is a complex task that requires an understanding of how certificates are created and managed, the services that use certificates, what function the certificates service, the needs of other applications, and how to minimize the expenditure on commercial certificates by only purchasing certificates that cover multiple hostnames. You should understand this information and plan how to meet your requirements before deploying anything.
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