IMAP doesn't exist. PHP must be compiled with IMAP enabled.
This is the first time I am installing the Osticket in Windows Server 2008R2 64 bit and configuring "Mail Account: Optional setting for fetching incoming emails. Mail fetching must be enabled with autocron active or external cron setup"But i getting error "IMAP doesn't exist. PHP must be compiled with IMAP enabled. Please guide me.
This is not an osTicket issue. It is your configuration of PHP one.
Enable the PHP extension for IMAP in your PHP.ini, and restart the webserver software.
IMAP doesn't exist. PHP must be compiled with IMAP enabled.
Then you didn't enable the IMAP extension in your php.ini and restart the webserver.
Arham Assuming you're using IIS, the default php.ini should already contain a line to load the extension but commented out:
;extension=php_imap.dll
Remove the comment at the front of the line so it reads as follows
extension=php_imap.dll
Then restart IIS and you should be good to go.
Your server OS also goes EOL in January, but I'm sure you already know that 
RBGE I wouldn't be so sure.....You made a great point about the commenting out in the INI file. I'd also say that the osTicket Youtube video on IIS installation would be a good resource to follow as well:
