When you add a user to Entryfy, the system sends an invitation letter to the email you've entered. Double-check the address while creating the user - you'll not be able to modify it later and if the address is incorrect, the user won't be able to enter the mobile app.
The letter for Regular users differs from the one sent to the Guest users.
The Regular users letter contains the links to download the app, the unique link to set up the password and brief instructions, including the link to the manual. Therefore, as a system administrator, you don't have to take any extra steps informing the user or giving any instructions - the process is automated and ensured by Entryfy.
The Guest users letter also contains links to the app and password setup. However, since app installation for Guest users is intended to be optional, the letter also contains the PIN, Passcode and QR code of the given user while also informing only the name of your organization. Therefore, by default, Guest user doesn't know the exact time and place of the event, and cannot apply Scan QR or Remote credentials. Make sure you've contacted the user directly and informed him/her about time and place of the event and the importance of the mobile app setup if any of this is relevant for the given event.
Is there anything that I, Entryfy Board administrator, need to inform user about while doing my job?
No, with the only exception for what is written above. We design Entryfy in a way that requires no direct communication between the user and the administrator. User receives notifications about the most important events - for example, the new credentials are issued or the old ones are canceled. Besides that, Entryfy mobile app is designed to serve as user's personal space within the system, while saving the user's activity history, showing credentials and explicitly explaining what the given credential is applicable to which doors and when.
For redundancy purposes or for quick direct communication, you may set up a communication channel between you and the users you're managing. But it's not a must. Unless there are Guest users that have no idea what's they've been invited to or if PIN, Passcode or QR code they receive won't actually open the door.