How do I Install SUS on a Server that is also running other IIS Enabled Applications like SharePoint

Automatic Updates with Software Update Services (SUS) might not work if IIS Enabled Applications like SharePoint�is installed in the Default Website.

The main purpose of separating SUS installation from the existing installation in the default website is to avoid the conflicting permissions as SUS requires the ANONYMOUS ACCESS on the website installed.

The best practice would be to install SUS on a separate website if you already have some IIS application sitting on Default Website.
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Review these steps;
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1. Before installation, open IIS Snap in.
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2. Stop all websites.
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3. Now run the SUS installer package.
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4. Since no sites are running, SUS will create a new site for it.
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5. Assign the site to run under another IP, and restart the rest of your sites.
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6. Make sure you put a DNS entry pointing to the site in the local DNS Server. (See More Information in this article)
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7. Then set clients to update from this IP ADDRESS.
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Generally, Sharepoint and SUS are not able to co-exist on one site & so in the Share Point Central Administrator configure exceptions for the following files and directories:�
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Exceptions on Directories:
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content
selfupdate
autoupdate
susadmin
dictionaries
shared

Exceptions on Files:�
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approveditems.txt
aucatalog1.cab
aurtf1.cab
iucert.cab
iuident.cab
wutrack.bin
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To configure the exceptions, follow these steps:

a. On the server that is running SUS Server and SharePoint Services, click Start, click Administrative Tools, and then click SharePoint Central Administration.

b. In the Virtual Server Configuration area, click Configure virtual server settings.

c. On the Virtual Server List tab, click the virtual server that you have to add the excluded paths to.

d. Under Virtual Server Management, click Define Managed Paths.

e. In the Add a New Path section, type the path to exclude in the Path box.

f. Click Excluded Path, and then click OK.

g. Repeat steps 4 through 6 for each folder that you want to exclude.

HOW TO: Use Host Header Names to Host Multiple Sites from One IP Address in IIS 5.0
http://support.microsoft.com/default.aspx?scid=kb;en-us;190008
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How To Use Host Header Names to Configure Multiple Web Sites in Internet Information Services 5.0
http://support.microsoft.com/default.aspx?scid=kb;en-us;308163

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