Sunday, September 20, 2009

ERROR: App-V. No connection could be made because the target machine actively refused it. Error code: 4513CDC-19D0682A-0000274D"

When launching a sequenced application you are presented with the following error message:

"The Application Virtualization Client could not update publishing
information from the server .

No connection could be made because the target machine actively refused it.
Error code: 4513CDC-19D0682A-0000274D"

Ensure that the "Application Virtualization Management Server" service is Started.

Monday, September 14, 2009

HOWTO: Search Group Names in Active Directory using wildcards

If you want to find a group in Active Directory but can't remember the whole name, you can use wildcards to assist in your search... here's how:

In Active Directory Users and Computers:
1. Find
2. Use the Find drop down list and change to Custom Search
3. Advanced tab
4. Enter in your LDAP query, for example:

name=* Managers
name=UK Company *

To query multiple attributes you can use operaters like &, , !, etc.

This post courtesy of

Wednesday, September 9, 2009

HOWTO: Replace default VMWare VirtualCenter SSL certificate with Enterprise CA certificate

  • Enterprise CA (or Public CA)
1. Download and install OpenSSL ( onto a PC in your domain
2. Navigate to OpenSSL\bin folder
3. Run the command "openssl req -new -nodes -out mycsr.csr -config openssl.cfg"
4. Follow the prompts. When asked to enter "Common Name (eg, YOUR name)" enter the FQDN of the VirtualCenter server.
5. Once complete, there are 2 files created in OpenSSL\bin folder: mycsr.csr and privkey.pem
6. Browse to your Enterprise CA web interface. eg
7. Select "Request a certificate"
8. Select "advanced certificate request"
9. Select "Submit a certificate request by using a base-64-encoded CMC or PKCS #10 file, or submit a renewal request by using a base-64-encoded PKCS #7 file."
10. Open mycsr.csr (should be in your OpenSSL\bin folder) in Notepad, copy and paste the contents in the "Base-64-encoded certificate request (CMC or PKCS #10 or PKCS #7):" text field
11. Change the Certificate Template to "Web Server"
12. Click Submit
13. Once the certificate has been successfully issued, select "Base 64 encoded" then "Download certificate"
14. Save certnew.cer to a convenient location.
15. Browse to the folder on your VirtualCenter server: "C:\Documents and Settings\All Users\Application Data\VMware\VMware VirtualCenter\SSL"
16. Backup existing files to another location just in case
17. Copy certnew.cer file and privkey.pem to this folder (both files will be in your OpenSSL\bin folder)
18. Rename certnew.cer file to rui.crt
19. Rename privkey.pem to rui.key
20. Restart VirtualCenter
21. Browse to the FQDN of the VCI. ( and verify certificate is correct and working
22. All done.

Reference Documents: