Recover 3CX Admin Password
If you have can not remember your 3CX Admin password there is no need to reinstall 3CX phone system.
Create a 3CX Backup using the 3CX Backup and Restore Tool and save to your desktop.
Using this link
This will output the backup to a compressed ZIP File
Unzip the backup file and open the contents.
Open the .XML file which is located on the main folder of the backup in Notepad
Use the Notepad CTRL+F find feature to look for
You content should be like
<Description>The admin id</Description>
The Password was set to test@123