I get this question very often – “how do we know when and who imported the solution into CRM?”

Whilst there are so many method of knowing it for e.g looking into database or checking in the XML, there is tool which can be used. Available as a plugin for XRM tool box. It shows something like below:

Download the XRMToolBox from here : https://www.xrmtoolbox.com/ and extract to a folder. Run the application & follow below steps:

1. from the main header options , click on tools> plugin store:
   
2. on the next screen search for “Solution History” and select the plugin and click on “Install”:
   
3. post this close this screenshot and open the tool from main xrmtoolbox navigatation.
   as soon as you open it – it will give you all the available solutions and as you select the solution it gives the information you need ( showed in the screenshot 1)

i hope this helps!