Administration

Table Of Contents
Logons, and therefore desktop power on operations, typically occur in a normally distributed manner over
a certain time window. You can approximate the peak power-on rate by assuming that it occurs in the
middle of the time window, during which about 40% of the power-on operations occur in 1/6th of the time
window. For example, if users log on between 8:00 AM and 9:00 AM, the time window is one hour, and
40% of the logons occur in the 10 minutes between 8:25 AM and 8:35 AM. If there are 2,000 users, 20%
of whom have their desktops powered off, then 40% of the 400 desktop power-on operations occur in
those 10 minutes. The peak power-on rate is 16 desktops per minute.
Accept the Thumbprint of a Default SSL Certificate
When you add vCenter Server and View Composer instances to Horizon 7, you must ensure that the SSL
certificates that are used for the vCenter Server and View Composer instances are valid and trusted by
Connection Server. If the default certificates that are installed with vCenter Server and View Composer
are still in place, you must determine whether to accept these certificates' thumbprints.
If a vCenter Server or View Composer instance is configured with a certificate that is signed by a CA, and
the root certificate is trusted by Connection Server, you do not have to accept the certificate thumbprint.
No action is required.
If you replace a default certificate with a certificate that is signed by a CA, but Connection Server does not
trust the root certificate, you must determine whether to accept the certificate thumbprint. A thumbprint is
a cryptographic hash of a certificate. The thumbprint is used to quickly determine if a presented certificate
is the same as another certificate, such as the certificate that was accepted previously.
Note If you install vCenter Server and View Composer on the same Windows Server host, they can use
the same SSL certificate, but you must configure the certificate separately for each component.
For details about configuring SSL certificates, see "Configuring SSL Certificates for View Servers" in the
View Installation document.
You first add vCenter Server and View Composer in Horizon Administrator by using the Add
vCenter Server wizard. If a certificate is untrusted and you do not accept the thumbprint, you cannot add
vCenter Server and View Composer.
After these servers are added, you can reconfigure them in the Edit vCenter Server dialog box.
Note You also must accept a certificate thumbprint when you upgrade from an earlier release and a
vCenter Server or View Composer certificate is untrusted, or if you replace a trusted certificate with an
untrusted certificate.
On the Horizon Administrator dashboard, the vCenter Server or View Composer icon turns red and an
Invalid Certificate Detected dialog box appears. You must click Verify and follow the procedure shown
here.
View Administration
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