I have a Wise installer where I've added the installation of EASendMail.exe /S to the code. Right before the installer is finished the EASendMail installer comes up for the user to go through. I don't want a client to see this during installation of my program. Is there a way to not show the EASendMail installer and have it run in the background?

What is your programming language? .NET or ActiveX.

If you're using .NET library, you just need to copy the dll in your application folder + your application to destination machine, then it is ok.

If you're using ActiveX Object, I suggest that you use manifest file instead of ActiveX Object registering.

https://www.emailarchitect.net/easendmail/sdk/?ct=object_reg_a 

I am using Access VBA. Through testing I found I can just copy the dll into the application folder and register it on my client's machine.

Thank you for your help.