Update-SPSolution does not Deploy Solution
I have a wsp that is already deployed on the farm. I made some code changes. I cannot use the Add-SPSolution command because I receive an "wsp already exists" error.
All I sm trying to accomplish is update the wsp that exists in the solution store. Then afterhours via Central Admin I'd like to deploy this updated wsp.
There's an Update-SPSolution command. Can I use this command? What does the -GACDeployment option do? Will this actually deploy the wsp? Will this cause an IIS reset?