Privileged users of application have the ability to send messages to other users of the application. For this purpose there is "Messenger" functionality in the "Administration" menu. At the home page of messenger functionality there is a search engine of users - recipients of the messages. Search of users is possible by any combination of the following criteria:

• name – first name or part of name of the user; capitalization does not matter
• surname – surname or part of surname of the user; capitalization does not matter
• login – login or part of user’s login; capitalization does not matter
• status – user’s status (active or blocked)
• role – role which the user has
• unit – administration unit

After entering the search criteria and pressing the search button, under the search engine displays a list of users that meet your search criteria. At each user from the list there is a field where you can mark that user as a recipient of the message.

After selecting the recipients and clicking on "Write a message to selected users" or pressing the "Write a message to all users" button (without selecting recipients, when the message has to be sent to all searched users) there is displayed the form to write a message to selected / all recipients.

After entering the subject and content of the message and possible changing of its priority and then pressing "Send message" button, message is sent to each of the recipients visible on the form.

In the form of users - recipients’ search engine, there is also a button to view the confirmation of messages’ receiving by the recipients to which it was sent. After pressing the "Acknowledgment of receipt" button, opens a new window with the search engine of messages. Messages can be searched by part of subject (capitalization does not matter), and the range of dates of sending messages. After determining the criteria and pressing the "Search" button, there is displayed a table of messages that match the search criteria with the designation for each recipient if the message has been received by him (read) or not.