When you try to open a Horizon FLEX virtual machine for the first time, you receive a message that states that the restrictions management server could not be contacted.

The error message Failed to contact the restrictions management server. Check the address of the server. appears when you try to open a Horizon FLEX virtual machine for the first time.

This error occurs because your computer does not trust the Horizon FLEX server's certificate.

1

Verify with your Horizon FLEX administrator that the certificate is valid for the Horizon FLEX server.

Important

Do not perform the steps in this procedure if the certificate is not valid.

2

If you are using Fusion Pro, perform these steps to install the Horizon FLEX server's certificate on your Mac.

a

In Safari or Firefox, navigate to the Horizon FLEX server URL.

For example: https://yourserver:7443

b

Accept the certificate warning to save the certificate.

c

Open the KeyChain application.

d

Find the certificate under login and drag and drop it to System.

e

Open the certificate under System, expand Trust, select Use System Default, and close the certificate.

f

Reopen the certificate under System, expand Trust, select Always Trust, and close the certificate.

The certificate is now trusted for all users on the Mac.

3

If you are using Player Pro, perform these steps to install the Horizon FLEX server's certificate on your Windows system.

a

In Chrome, navigate to the Horizon FLEX URL.

For example: https://yourserver:7443

b

Click the lock icon in the address bar.

c

Click Certificate information.

d

On the Details tab, click Copy to file and export the certificate to a file.

e

Start MMC (mmc.exe).

f

Add the Certificates snap-in for the computer account and manage certificates for the local computer.

g

Import the certificate into Trusted Root Certification Authorities > Certificates.

The certificate is now trusted for all users on your Windows computer.