I have been using the solution for fifteen years. 

I have been using Microsoft Exchange for around five to six years.

I have been using Microsoft Exchange for twenty years. I am an end user of the product.

I've been using the solution for 13 or 14 years. 

I have been using the solution for ten years.

I have been using the solution for ten years. 

We have been using this solution for four years. 

We have been using Microsoft Exchange for four and a half years.

I have been working with Microsoft  Exchange for twenty-three years. 

I have been using this solution for more the ten years. We use the latest version. It's the cloud version of the Microsoft 365 solution that includes the Exchange Server. So, we use the latest solution provided by Microsoft in their cloud environment.

I have been using this solution for the last five years. We use the latest version.

I've been using this solution for 10 years. 

I have been using Microsoft Exchange for a very long time. Currently, we are on the cloud version.

I've been using Microsoft for 15 years. 

I have been using Microsoft Exchange for seven years.

I have been using Microsoft Exchange for approximately 10 years.

I’ve used the solution for a couple of years.

I've been using the solution for over 15 years. 

I've been using the solution for a year now. 

I’ve used the solution for many, many years.

I have been using the product for ten years. 

I've been using Microsoft Exchange for two years.

I have been using Microsoft Exchange for approximately four years.

I've been working with Microsoft Exchange off and on for several years. It's not something I use daily. I work with it when I'm brought in to provide migration or implementation services. 

We have been using Microsoft Exchange for three years.

I have been using Microsoft Exchange for approximately 10 years.

I have been using Microsoft Exchange since I joined this company back in 2008.

I have used Exchange for the last 12 years.

I have used Microsoft Exchange within the last 12 months.

I've been using Microsoft Exchange since 1996.

I've used the solution for as long as I've worked with the company I'm at now. It's been a few years at this point. 

I have been working with this solution for about five years. 

I've been using Exchange for many years now. 

I've used it for a couple of years. I've used Exchange 2003, 2007, 2012, and 2015.

I have been using Microsoft Exchange for approximately four years.

I have used Microsoft Exchange within the last 12 months.

I have been using this solution for more than 15 years.

I've been using this solution for a few years.

I've worked as an administrator of Microsoft Exchange for five years.

I've been using Microsoft Exchange for seven or eight years.

I have been working with Microsoft Exchange for about three or four years.

I have been using Microsoft Exchange for approximately 10 years.

I have been using Microsoft Exchange for three years.

I have been using the solution for three years.

I've been using Microsoft Exchange for 15 years.

I have been using Microsoft Exchange for approximately 20 years.

I have been using this solution for seven to eight years.

I have been using Microsoft Exchange for about ten years.

Currently, we are using Office 365, but we used Exchange for more than 20 years.

It has been in use for 10 to 15 years.

I have been using Microsoft Exchange for about five years.

I have used Microsoft Exchange for a couple of years. I'm now using Office 365, Exchange Online.

I've probably been using the solution, on different jobs, for about 20 years at this point.

I have been working with Exchange for the last 10 years.

I have been using Microsoft Exchange for approximately 10 years.

I have been selling Microsoft Exchange for approximately 12 years.

We sell various versions, it depends on the current market.

I have been using Microsoft Exchange for around ten years.

We have been using Microsoft Exchange for the last 15 years.

I've been working for around nine years with Microsoft Exchange.

I have been working with Microsoft Exchange for more than ten years.

It is deployed both on-premise and on the cloud.

I have been using Microsoft Exchange for approximately eight years.

I joined the company two months ago and I have been using Microsoft Exchange since then. The company has been using it for much longer.

I have been using Microsoft Exchange for approximately five years.

I have been using the solution for five years.

I've been working with this solution for close to five years. 

I've been using this solution for at least 15 years.

I've been using this solution for fifteen to sixteen years.

I have been working with Microsoft Exchange for 15 years.

Historically, this solution was on-premises, and now it is cloud-based.

I have been using Microsoft Exchange for approximately 20 years.

Two and a half years. Currently, I am not working in the specific project. so I am not using it, but the company is using it.

I have been using Microsoft Exchange for approximately five years.