[Update to the Known Issue below. This issue was fixed in a LCS hotfix released on 27th July 2017. ]
The Maintain button on the Environment page in Microsoft Dynamics Lifecycle Services (LCS) lets environment managers apply binary updates directly to their Microsoft Dynamics 365 for Operations environment from LCS. However, because of a known issue, binary updates can no longer be applied to build environments. This change is temporary.
To work around this issue and continue to apply a binary update to a build environment, you must use Remote Desktop Protocol (RDP) to sign in to the virtual machine (VM) environment. Then follow these steps: