I just upgraded my vcenter 6.5 (windows) to 6.7 and got this message
will this affect horizon view/composer and users?
Remember how we keep talking about helping yourself first? Did you do any Googling? If you had, you would have run across this KB which gives you the status for, among others, Horizon View.
Supporting TLS versions 1.0 and 1.1 in vCenter 6.7 are deprecated. So you can have just TLS 1.2. (It was mentioned in vSphere 6.7 related KBs)