diff --git a/conf/msg_install b/conf/msg_install
new file mode 100644
index 0000000..ed257a7
--- /dev/null
+++ b/conf/msg_install
@@ -0,0 +1,11 @@
+__APP__ was successfully installed :)
+
+Please open your __APP__ domain: https://__DOMAIN____PATH_URL__
+
+To configure your OnlyOffice with your Nextcloud, go to the settings :
+    - under "Administration > ONLYOFFICE > Server settings > Address of the Document Server" enter "https://__DOMAIN____PATH_URL__"
+    - under "Administration > ONLYOFFICE > Server settings > Secret key" enter "__JWT_TOKEN__"
+
+Your OnlyOffice should now work with your Nextcloud!
+
+If you are facing any problem or want to improve this app, please open a new issue here: https://github.com/YunoHost-Apps/onlyoffice_ynh
\ No newline at end of file
diff --git a/manifest.json b/manifest.json
index b60987d..4cf4f5a 100644
--- a/manifest.json
+++ b/manifest.json
@@ -69,6 +69,10 @@
                     "fr": "Installez le connecteur OnlyOffice pour éditer des documents dans Nextcloud."
                 },
                 "default": "yunohost.domain/nextcloud"
+            },
+            {
+                "name": "admin",
+                "type": "user"
             }
         ]
     }
diff --git a/scripts/install b/scripts/install
index 61a3bfe..b71beed 100644
--- a/scripts/install
+++ b/scripts/install
@@ -8,6 +8,7 @@
 
 source _common.sh
 source /usr/share/yunohost/helpers
+source ynh_send_readme_to_admin__2
 
 #=================================================
 # MANAGE SCRIPT FAILURE
@@ -26,6 +27,8 @@ is_public=$YNH_APP_ARG_IS_PUBLIC
 nextclouddomain=$YNH_APP_ARG_NEXTCLOUDDOMAIN
 
 app=$YNH_APP_INSTANCE_NAME
+admin=$YNH_APP_ARG_ADMIN
+admin_mail=$(ynh_user_get_info --username=$admin --key="mail")
 
 #=================================================
 # CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
@@ -176,6 +179,15 @@ ynh_script_progression --message="Reloading NGINX web server..."
 
 ynh_systemd_action --service_name=nginx --action=reload
 
+#=================================================
+# SEND A README FOR THE ADMIN
+#=================================================
+ynh_script_progression --message="Sending a readme for the admin..."
+
+jwt_token=$(documentserver-jwt-status.sh | sed "3q;d" | cut -d "-" -f 2 | tr -d ' ')
+
+ynh_send_readme_to_admin --app_message="../conf/msg_install" --recipients=$admin_mail --type='install'
+
 #=================================================
 # END OF SCRIPT
 #=================================================
diff --git a/scripts/ynh_send_readme_to_admin__2 b/scripts/ynh_send_readme_to_admin__2
new file mode 100644
index 0000000..0d4403d
--- /dev/null
+++ b/scripts/ynh_send_readme_to_admin__2
@@ -0,0 +1,127 @@
+#!/bin/bash
+
+# Send an email to inform the administrator
+#
+# usage: ynh_send_readme_to_admin --app_message=app_message [--recipients=recipients] [--type=type]
+# | arg: -m --app_message= - The file with the content to send to the administrator.
+# | arg: -r, --recipients= - The recipients of this email. Use spaces to separate multiples recipients. - default: root
+#	example: "root admin@domain"
+#	If you give the name of a YunoHost user, ynh_send_readme_to_admin will find its email adress for you
+#	example: "root admin@domain user1 user2"
+# | arg: -t, --type= - Type of mail, could be 'backup', 'change_url', 'install', 'remove', 'restore', 'upgrade'
+#
+# Requires YunoHost version 4.1.0 or higher.
+ynh_send_readme_to_admin() {
+	# Declare an array to define the options of this helper.
+	declare -Ar args_array=( [m]=app_message= [r]=recipients= [t]=type= )
+	local app_message
+	local recipients
+	local type
+	# Manage arguments with getopts
+
+	ynh_handle_getopts_args "$@"
+	app_message="${app_message:-}"
+	recipients="${recipients:-root}"
+	type="${type:-install}"
+
+	# Get the value of admin_mail_html
+	admin_mail_html=$(ynh_app_setting_get $app admin_mail_html)
+	admin_mail_html="${admin_mail_html:-0}"
+
+	# Retrieve the email of users
+	find_mails () {
+		local list_mails="$1"
+		local mail
+		local recipients=" "
+		# Read each mail in argument
+		for mail in $list_mails
+		do
+			# Keep root or a real email address as it is
+			if [ "$mail" = "root" ] || echo "$mail" | grep --quiet "@"
+			then
+				recipients="$recipients $mail"
+			else
+				# But replace an user name without a domain after by its email
+				if mail=$(ynh_user_get_info "$mail" "mail" 2> /dev/null)
+				then
+					recipients="$recipients $mail"
+				fi
+			fi
+		done
+		echo "$recipients"
+	}
+	recipients=$(find_mails "$recipients")
+
+	# Subject base
+	local mail_subject="☁️🆈🅽🅷☁️: \`$app\`"
+
+	# Adapt the subject according to the type of mail required.
+	if [ "$type" = "backup" ]; then
+		mail_subject="$mail_subject has just been backup."
+	elif [ "$type" = "change_url" ]; then
+		mail_subject="$mail_subject has just been moved to a new URL!"
+	elif [ "$type" = "remove" ]; then
+		mail_subject="$mail_subject has just been removed!"
+	elif [ "$type" = "restore" ]; then
+		mail_subject="$mail_subject has just been restored!"
+	elif [ "$type" = "upgrade" ]; then
+		mail_subject="$mail_subject has just been upgraded!"
+	else	# install
+		mail_subject="$mail_subject has just been installed!"
+	fi
+
+	ynh_add_config --template="$app_message" --destination="../conf/msg__to_send"
+
+	ynh_delete_file_checksum --file="../conf/msg__to_send"
+
+	local mail_message="This is an automated message from your beloved YunoHost server.
+Specific information for the application $app.
+$(cat "../conf/msg__to_send")"
+
+	# Store the message into a file for further modifications.
+	echo "$mail_message" > mail_to_send
+
+	# If a html email is required. Apply html tags to the message.
+ 	if [ "$admin_mail_html" -eq 1 ]
+ 	then
+		# Insert 'br' tags at each ending of lines.
+		ynh_replace_string "$" "<br>" mail_to_send
+
+		# Insert starting HTML tags
+		sed --in-place '1s@^@<!DOCTYPE html>\n<html>\n<head></head>\n<body>\n@' mail_to_send
+
+		# Keep tabulations
+		ynh_replace_string "  " "\&#160;\&#160;" mail_to_send
+		ynh_replace_string "\t" "\&#160;\&#160;" mail_to_send
+
+		# Insert url links tags
+		ynh_replace_string "__URL_TAG1__\(.*\)__URL_TAG2__\(.*\)__URL_TAG3__" "<a href=\"\2\">\1</a>" mail_to_send
+
+		# Insert finishing HTML tags
+		echo -e "\n</body>\n</html>" >> mail_to_send
+
+	# Otherwise, remove tags to keep a plain text.
+	else
+		# Remove URL tags
+		ynh_replace_string "__URL_TAG[1,3]__" "" mail_to_send
+		ynh_replace_string "__URL_TAG2__" ": " mail_to_send
+	fi
+
+	# Define binary to use for mail command
+	if [ -e /usr/bin/bsd-mailx ]
+	then
+		local mail_bin=/usr/bin/bsd-mailx
+	else
+		local mail_bin=/usr/bin/mail.mailutils
+	fi
+
+	if [ "$admin_mail_html" -eq 1 ]
+	then
+		content_type="text/html"
+	else
+		content_type="text/plain"
+	fi
+
+	# Send the email to the recipients
+	cat mail_to_send | $mail_bin -a "Content-Type: $content_type; charset=UTF-8" -s "$mail_subject" "$recipients"
+}
\ No newline at end of file