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HTML Access Group Policy Settings
The HTML Access ADM Template file,
Blast-enUS.adm
, contains group policy settings that you can apply to
your Horizon View desktops. After the template file is imported into Active Directory, the HTML Access
group policy settings are contained in the
VMware Blast
folder in the Group Policy Editor.
Table 2. HTML Access Group Policy Settings
Setting
Description
Screen Blanking
Controls whether the remote virtual machine can be seen from outside of
Horizon View during an HTML Access session. For example, an administrator might
use vSphere Web Client to open a console on the virtual machine while a user is
connected to the desktop through HTML Access.
When this setting is enabled or not configured, and someone attempts to access the
remote virtual machine from outside of Horizon View while an HTML Access session
is active, the remote virtual machine displays a blank screen.
When this setting is disabled, under the preceding conditions, the remote virtual
machine displays the active Horizon View desktop session to the second remote
accessor.
Session Garbage Collection
Controls the garbage collection of abandoned remoting sessions. When this setting is
enabled, you can configure the garbage collection interval and threshold.
The interval controls how often the garbage collector runs. You set the interval in
milliseconds.
The threshold determines how much time must pass after a session is abandoned
before it becomes a candidate for deletion. You set the threshold in seconds.
Audio playback
Controls whether audio playback is allowed on the View desktop. By default, this
setting is enabled.
Image Quality
Controls the image quality of the remote display. There are three image quality
profiles, low, medium, and high. The encoder tries to use the best quality level possible,
given the constraints of available bandwidth, recent frame-rate, and the size of the
region that has recently changed in the current frame. The encoder keeps track of
which regions of the client screen are currently low- or medium-quality and
incrementally improves those areas to high quality.
When this setting is enabled, you can separately change the low-, medium-, and high-
quality JPEG settings to different values. The actual JPEG quality levels used at low,
medium, and high settings are individually configurable as numbers between 0 and
100.
Chroma subsampling is enabled according to the JPEG quality level chosen. Whenever
JPEG quality set to 80 or higher, chroma-subsampling is turned off and the ratio is set
to the highest available value, YUV-4:4:4. For JPEG quality set to 79 or below, the ratio
is set to YUV-4:2:0.
n
Low JPEG Quality. By default, this value is 25. You can also set the low JPEG
chroma subsampling to various ratios. By default, the low ratio is set to the lowest
available value, 4:1:0.
n
Mid JPEG Quality. By default, this value is 35. You can also set the low JPEG
chroma subsampling to various ratios. By default, the low ratio is set to the lowest
available value, 4:2:0.
n
High JPEG Quality. By default, this value is 90.You can also set the high JPEG
chroma subsampling to various ratios. By default, the low ratio is set to the highest
available value, 4:4:4.
Using VMware Horizon View HTML Access
VMware, Inc.
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