Hi,
Suddenly this morning custom MSI hosts are not downloading the customizations/logos. We've been using a custom host for the past 18 months, and deploy it via GPO. Suddenly this morning, only the default teamviewer host is installing.

I've tested on my workstation uninstallling & using MSIEXEC to re-install, but with the same result. The install file is called TeamViewer_Host-idca1b2c3d4.msi with a1b2c3d4 = the custom host code from the deployment page. I can see the custom hosts exists in our online console. However checking the TeamViewer11_LogFile.log I see the below:
2016/12/14 09:00:06.959 8692 1544 S0 CustomConfigurationUpdaterImplWin::ReadInitialConfigurationId: Initial configuration "a1b2c3d4".
2016/12/14 09:00:06.959 8692 1544 S0 CustomConfigurationUpdaterGUI::GetInitialorExisitingConfigurationId initial id: a1b2c3d4
016/12/14 09:00:07.514 8692 7780 S0 Resource-Language: en
2016/12/14 09:00:07.514 8692 7780 S0!! CMasterConnector::LoginUser(): no CustomID!
2016/12/14 09:00:13.696 10036 9000 G1 CMain::LoadResourceDLLs(): No custom resource dll found
2016/12/14 09:00:13.713 10036 9000 G1!!!CMessageLayer::AcquireMessageFromMaster: no TeamViewer ID
2016/12/14 09:00:13.967 10036 9000 G1 CMainWindowCustomizable::InitHeadLineBkgndUnscaled(): no logo file (or loading failed)
It seems like the download link, or folder that holds the logo & customizations is not accessible?