I have been using Microsoft Identity Manager for eight years.

I have been using the solution for two years.

I have been using Microsoft Identity Manager for eight years.

We have been using Microsoft Identity Manager for a couple of years.

I've been using this solution for ten years.

I've been using this solution since 2008. 

I have been using this solution for a few years. 

We have been using Microsoft Identity Manager since 2016.

Internally, we have been using this solution for about four years. We are using its latest version.

One to three years.

We have been selling this solution for the last five years.

I have been using this solution since 2006, but it had a different name at that time.