As soon as you installed R06 on the test server, that test server became the ZDC. Webster From: thin-bounce@xxxxxxxxxxxxx [mailto:thin-bounce@xxxxxxxxxxxxx] On Behalf Of Angela Smith Subject: [THIN] Rollup Pack install order Hi Im looking at installing Rollup 6 on XenApp 4.5. The Citrix best practice guide states the install should be in the following order: 1. Zone data collector 2. Backup zone data collectors 3. Database connection server (Resource Manager) 4. Primary farm metric server (Resource Manager) 5. Backup farm metric server (Resource Manager) 6. Member servers The guide also states you should put it on a test server. I dont have a dev farm but I do have test servers on the Production farm. I have installed R06 on a test server but the ZDC is still on R05. Will I have issues or should I install R06 on the ZDC now?