1. Launch Exchange Management Shell
Click on Start and then expand Exchange Server 2019 and right click on the Exchange Management Shell and select "Run as Administrator"
2. Type in command
Type in the command: Get-mailbox -Identity User5
3. Type in command
Run the following command to view more information: get-mailbox -identity User5 | Get-mailboxstatistics
4. Type in command
Run the following command to view all information: get-mailbox -identity User5 | Get-mailboxstatistics | fl