A decade or so ago I addressed this with some older analog cameras using a cs-mount polarizing filter that fit between the camera's lens and the camera. I can't find the company anymore, and this is something of high interest to me.
I have corresponded with one manufacturer about it, asking about polarizing filters, but I have to provide them with example video so their engineers can see the exact issue, and I haven't done that yet.
You can find all kinds of material about polarizing filters for photographers and professional SLR cameras, but I have searched hard without results for any information about using polarizing filters for security video camera applications.
There is an additional complication with the housing front glass on outdoor cameras, which if dusty can make this kind of problem even worse due to high diffusion of sunlight passing through the "dust filter" on the housing glass. It's probably similar with domes in dusty areas as well.
Reflectivity off vehicle license plates mid-morning and mid-afternoon can be an issue as well, and I'm pursuing the issue now for a client who has sunlight washing out the plates at those times on cloudless days.
I am very interested in getting information from anyone who has use polarizing film on outdoor camera housing glass plates, or polarizing filters on cameras, whether cs-mount or in some other configuration.