Certain Certificate Authority providers, such as GoDaddy allow you to renew an SSL certificate using the same CSR and private key. This greatly simplifies the procedure to renew a certificate, but this can also complicate things if you don't have your private key readily available.

On a server running ADFS 3.0 for instance, you do not have IIS available to allow an easy SSL certificate renewal (or even a request). Or perhaps, you lost the current private key, or it is located somewhere where it's not easily accessible.

Luckily, there's a fairly easy way to extract the private key from the previous SSL certificate on your Windows server. By using the Windows Certificate store functionality   ...

If for some reason you need to enable Basic Authentication, you can do so quickly through the Exchange Management Shell. This is sometimes needed if you're migrating to Exchange from another (third-party) e-mail provider.

If you do not know what Basic Authentication is, you do not need this!

Start up EMS as an account which has the required permissions to make changes to the virtual directories used by Exchange. Then, run this:

Set-WebServicesVirtualDirectory -Identity "EWS (Default Web Site)" -BasicAuthentication $true

Note that Office365 has Basic Authentication enabled by default.