diff --git a/cloud/microsoft/office365/custom/graphapi.pm b/cloud/microsoft/office365/custom/graphapi.pm
index 2e8f88319..274652950 100644
--- a/cloud/microsoft/office365/custom/graphapi.pm
+++ b/cloud/microsoft/office365/custom/graphapi.pm
@@ -324,6 +324,40 @@ sub office_get_onedrive_usage {
     return $response;
 }
 
+sub office_get_exchange_activity_set_url {
+    my ($self, %options) = @_;
+
+    my $url = $self->{graph_endpoint} . "/v1.0/reports/getEmailActivityUserDetail(period='D7')";
+
+    return $url;
+}
+
+sub office_get_exchange_activity {
+    my ($self, %options) = @_;
+
+    my $full_url = $self->office_get_exchange_activity_set_url(%options);
+    my $response = $self->request_api_csv(method => 'GET', full_url => $full_url, hostname => '');
+    
+    return $response;
+}
+
+sub office_get_exchange_mailbox_usage_set_url {
+    my ($self, %options) = @_;
+
+    my $url = $self->{graph_endpoint} . "/v1.0/reports/getMailboxUsageDetail(period='D7')";
+
+    return $url;
+}
+
+sub office_get_exchange_mailbox_usage {
+    my ($self, %options) = @_;
+
+    my $full_url = $self->office_get_exchange_mailbox_usage_set_url(%options);
+    my $response = $self->request_api_csv(method => 'GET', full_url => $full_url, hostname => '');
+    
+    return $response;
+}
+
 1;
 
 __END__
diff --git a/cloud/microsoft/office365/exchange/mode/emailactivity.pm b/cloud/microsoft/office365/exchange/mode/emailactivity.pm
new file mode 100644
index 000000000..26d90e713
--- /dev/null
+++ b/cloud/microsoft/office365/exchange/mode/emailactivity.pm
@@ -0,0 +1,152 @@
+#
+# Copyright 2018 Centreon (http://www.centreon.com/)
+#
+# Centreon is a full-fledged industry-strength solution that meets
+# the needs in IT infrastructure and application monitoring for
+# service performance.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+package cloud::microsoft::office365::exchange::mode::emailactivity;
+
+use base qw(centreon::plugins::templates::counter);
+
+use strict;
+use warnings;
+
+sub prefix_user_output {
+    my ($self, %options) = @_;
+    
+    return "User '" . $options{instance_value}->{name} . "' ";
+}
+
+sub set_counters {
+    my ($self, %options) = @_;
+
+    $self->{maps_counters_type} = [
+        { name => 'users', type => 1, cb_prefix_output => 'prefix_user_output', message_multiple => 'All email activity are ok' },
+    ];
+    
+    $self->{maps_counters}->{users} = [
+        { label => 'send-count', set => {
+                key_values => [ { name => 'send_count' }, { name => 'name' } ],
+                output_template => 'Send Count: %d',
+                perfdatas => [
+                    { label => 'send_count', value => 'send_count_absolute', template => '%d',
+                      min => 0, label_extra_instance => 1, instance_use => 'name_absolute' },
+                ],
+            }
+        },
+        { label => 'receive-count', set => {
+                key_values => [ { name => 'receive_count' }, { name => 'name' } ],
+                output_template => 'Receive Count: %d',
+                perfdatas => [
+                    { label => 'receive_count', value => 'receive_count_absolute', template => '%d',
+                      min => 0, label_extra_instance => 1, instance_use => 'name_absolute' },
+                ],
+            }
+        },
+        { label => 'read-count', set => {
+                key_values => [ { name => 'read_count' }, { name => 'name' } ],
+                output_template => 'Read Count: %d',
+                perfdatas => [
+                    { label => 'read_count', value => 'read_count_absolute', template => '%d',
+                      min => 0, label_extra_instance => 1, instance_use => 'name_absolute' },
+                ],
+            }
+        },
+        { label => 'last-activity', threshold => 0, set => {
+                key_values => [ { name => 'last_activity_date' }, { name => 'name' } ],
+                output_template => 'Last Activity: %s',
+            }
+        },
+    ];
+}
+
+sub new {
+    my ($class, %options) = @_;
+    my $self = $class->SUPER::new(package => __PACKAGE__, %options);
+    bless $self, $class;
+    
+    $self->{version} = '1.0';
+    $options{options}->add_options(arguments =>
+                                {
+                                    "filter-user:s"     => { name => 'filter_user' },
+                                });
+    
+    return $self;
+}
+
+sub check_options {
+    my ($self, %options) = @_;
+    $self->SUPER::check_options(%options);
+}
+
+sub manage_selection {
+    my ($self, %options) = @_;
+    
+    $self->{users} = {};
+
+    my $results = $options{custom}->office_get_exchange_activity();
+
+    foreach my $user (@{$results}) {
+        if (defined($self->{option_results}->{filter_user}) && $self->{option_results}->{filter_user} ne '' &&
+            $user->{'User Principal Name'} !~ /$self->{option_results}->{filter_user}/) {
+            $self->{output}->output_add(long_msg => "skipping  '" . $user->{'User Principal Name'} . "': no matching filter name.", debug => 1);
+            next;
+        }
+
+        $self->{users}->{$user->{'User Principal Name'}}->{name} = $user->{'User Principal Name'};
+        $self->{users}->{$user->{'User Principal Name'}}->{send_count} = $user->{'Send Count'};
+        $self->{users}->{$user->{'User Principal Name'}}->{receive_count} = $user->{'Receive Count'};
+        $self->{users}->{$user->{'User Principal Name'}}->{read_count} = $user->{'Read Count'};
+        $self->{users}->{$user->{'User Principal Name'}}->{last_activity_date} = $user->{'Last Activity Date'};
+    }
+    
+    if (scalar(keys %{$self->{users}}) <= 0) {
+        $self->{output}->add_option_msg(short_msg => "No entry found.");
+        $self->{output}->option_exit();
+    }
+}
+
+1;
+
+__END__
+
+=head1 MODE
+
+Check email activity (reporting period over the last 7 days).
+
+(See link for details about metrics :
+https://docs.microsoft.com/en-us/office365/admin/activity-reports/email-activity?view=o365-worldwide)
+
+=over 8
+
+=item B<--filter-user>
+
+Filter users.
+
+=item B<--warning-*>
+
+Threshold warning.
+Can be: 'send-count', 'receive-count', 'read-count'.
+
+=item B<--critical-*>
+
+Threshold critical.
+Can be: 'send-count', 'receive-count', 'read-count'.
+
+=back
+
+=cut
diff --git a/cloud/microsoft/office365/exchange/mode/mailboxusage.pm b/cloud/microsoft/office365/exchange/mode/mailboxusage.pm
new file mode 100644
index 000000000..76eb6b7c0
--- /dev/null
+++ b/cloud/microsoft/office365/exchange/mode/mailboxusage.pm
@@ -0,0 +1,210 @@
+#
+# Copyright 2018 Centreon (http://www.centreon.com/)
+#
+# Centreon is a full-fledged industry-strength solution that meets
+# the needs in IT infrastructure and application monitoring for
+# service performance.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+package cloud::microsoft::office365::exchange::mode::mailboxusage;
+
+use base qw(centreon::plugins::templates::counter);
+
+use strict;
+use warnings;
+
+my $instance_mode;
+
+sub custom_usage_perfdata {
+    my ($self, %options) = @_;
+
+    my $extra_label = '';
+    $extra_label = '_' . $self->{result_values}->{display} if (!defined($options{extra_instance}) || $options{extra_instance} != 0);
+    
+    $self->{output}->perfdata_add(label => 'used' . $extra_label,
+                                  unit => 'B',
+                                  value => $self->{result_values}->{used},
+                                  min => 0);
+}
+
+sub custom_status_threshold {
+    my ($self, %options) = @_; 
+    my $status = 'ok';
+    my $message;
+    
+    eval {
+        local $SIG{__WARN__} = sub { $message = $_[0]; };
+        local $SIG{__DIE__} = sub { $message = $_[0]; };
+        
+        if (defined($instance_mode->{option_results}->{critical_status}) && $instance_mode->{option_results}->{critical_status} ne '' &&
+            eval "$instance_mode->{option_results}->{critical_status}") {
+            $status = 'critical';
+        } elsif (defined($instance_mode->{option_results}->{warning_status}) && $instance_mode->{option_results}->{warning_status} ne '' &&
+            eval "$instance_mode->{option_results}->{warning_status}") {
+            $status = 'warning';
+        }
+    };
+    if (defined($message)) {
+        $self->{output}->output_add(long_msg => 'filter status issue: ' . $message);
+    }
+
+    return $status;
+}
+
+sub custom_status_output {
+    my ($self, %options) = @_;
+    
+    my ($used_value, $used_unit) = $self->{perfdata}->change_bytes(value => $self->{result_values}->{used});
+    my ($issue_warning_quota_value, $issue_warning_quota_unit) = $self->{perfdata}->change_bytes(value => $self->{result_values}->{issue_warning_quota});
+    my ($prohibit_send_quota_value, $prohibit_send_quota_unit) = $self->{perfdata}->change_bytes(value => $self->{result_values}->{prohibit_send_quota});
+    my ($prohibit_send_receive_quota_value, $prohibit_send_receive_quota_unit) = $self->{perfdata}->change_bytes(value => $self->{result_values}->{prohibit_send_receive_quota});
+    
+    my $msg = sprintf("Used: %s Issue Warning Quota: %s Prohibit Send Quota: %s Prohibit Send/Receive Quota: %s", 
+            $used_value . " " . $used_unit, 
+            $issue_warning_quota_value . " " . $issue_warning_quota_unit, 
+            $prohibit_send_quota_value . " " . $prohibit_send_quota_unit, 
+            $prohibit_send_receive_quota_value . " " . $prohibit_send_receive_quota_unit);
+    return $msg;
+}
+
+sub custom_status_calc {
+    my ($self, %options) = @_;
+    
+    $self->{result_values}->{display} = $options{new_datas}->{$self->{instance} . '_name'};
+    $self->{result_values}->{used} = $options{new_datas}->{$self->{instance} . '_storage_used'};
+    $self->{result_values}->{issue_warning_quota} = $options{new_datas}->{$self->{instance} . '_issue_warning_quota'};
+    $self->{result_values}->{prohibit_send_quota} = $options{new_datas}->{$self->{instance} . '_prohibit_send_quota'};
+    $self->{result_values}->{prohibit_send_receive_quota} = $options{new_datas}->{$self->{instance} . '_prohibit_send_receive_quota'};
+    return 0;
+}
+
+sub prefix_user_output {
+    my ($self, %options) = @_;
+    
+    return "User '" . $options{instance_value}->{name} . "' ";
+}
+
+sub set_counters {
+    my ($self, %options) = @_;
+
+    $self->{maps_counters_type} = [
+        { name => 'users', type => 1, cb_prefix_output => 'prefix_user_output', message_multiple => 'All mailbox usage are ok' },
+    ];
+    
+    $self->{maps_counters}->{users} = [
+        { label => 'usage', set => {
+                key_values => [ { name => 'storage_used' }, { name => 'issue_warning_quota' },
+                    { name => 'prohibit_send_quota' }, { name => 'prohibit_send_receive_quota' }, { name => 'name' } ],
+                closure_custom_calc => $self->can('custom_status_calc'),
+                closure_custom_output => $self->can('custom_status_output'),
+                closure_custom_perfdata => $self->can('custom_usage_perfdata'),
+                closure_custom_threshold_check => $self->can('custom_status_threshold'),
+            }
+        },
+    ];
+}
+
+sub new {
+    my ($class, %options) = @_;
+    my $self = $class->SUPER::new(package => __PACKAGE__, %options);
+    bless $self, $class;
+    
+    $self->{version} = '1.0';
+    $options{options}->add_options(arguments =>
+                                {
+                                    "filter-user:s"             => { name => 'filter_user' },
+                                    "warning-status:s"          => { name => 'warning_status', default => '%{storage_used} > %{issue_warning_quota}' },
+                                    "critical-status:s"         => { name => 'critical_status', default => '%{storage_used} > %{prohibit_send_quota}' },
+                                });
+    
+    return $self;
+}
+
+sub change_macros {
+    my ($self, %options) = @_;
+
+    foreach (('warning_status', 'critical_status')) {
+        if (defined($self->{option_results}->{$_})) {
+            $self->{option_results}->{$_} =~ s/%\{(.*?)\}/\$self->{result_values}->{$1}/g;
+        }
+    }
+}
+
+sub check_options {
+    my ($self, %options) = @_;
+    $self->SUPER::check_options(%options);
+    
+    $instance_mode = $self;
+    $self->change_macros();
+}
+
+sub manage_selection {
+    my ($self, %options) = @_;
+    
+    $self->{users} = {};
+
+    my $results = $options{custom}->office_get_exchange_mailbox_usage();
+
+    foreach my $user (@{$results}) {
+        if (defined($self->{option_results}->{filter_user}) && $self->{option_results}->{filter_user} ne '' &&
+            $user->{'User Principal Name'} !~ /$self->{option_results}->{filter_user}/) {
+            $self->{output}->output_add(long_msg => "skipping  '" . $user->{'User Principal Name'} . "': no matching filter name.", debug => 1);
+            next;
+        }
+
+        $self->{users}->{$user->{'User Principal Name'}}->{name} = $user->{'User Principal Name'};
+        $self->{users}->{$user->{'User Principal Name'}}->{storage_used} = $user->{'Storage Used (Byte)'};
+        $self->{users}->{$user->{'User Principal Name'}}->{issue_warning_quota} = $user->{'Issue Warning Quota (Byte)'};
+        $self->{users}->{$user->{'User Principal Name'}}->{prohibit_send_quota} = $user->{'Prohibit Send Quota (Byte)'};
+        $self->{users}->{$user->{'User Principal Name'}}->{prohibit_send_receive_quota} = $user->{'Prohibit Send/Receive Quota (Byte)'};
+        $self->{users}->{$user->{'User Principal Name'}}->{last_activity_date} = $user->{'Last Activity Date'};
+    }
+    
+    if (scalar(keys %{$self->{users}}) <= 0) {
+        $self->{output}->add_option_msg(short_msg => "No entry found.");
+        $self->{output}->option_exit();
+    }
+}
+
+1;
+
+__END__
+
+=head1 MODE
+
+Check mailbox usage (reporting period over the last 7 days).
+
+(See link for details about metrics :
+https://docs.microsoft.com/en-us/office365/admin/activity-reports/mailbox-usage?view=o365-worldwide)
+
+=over 8
+
+=item B<--filter-user>
+
+Filter users.
+
+=item B<--warning-status>
+
+Set warning threshold for status (Default: '%{storage_used} > %{issue_warning_quota}').
+Can used special variables like: %{used}, %{issue_warning_quota}, %{prohibit_send_quota}, %{prohibit_send_receive_quota}
+
+=item B<--critical-status>
+
+Set critical threshold for status (Default: '%{storage_used} > %{prohibit_send_quota}').
+Can used special variables like: %{used}, %{issue_warning_quota}, %{prohibit_send_quota}, %{prohibit_send_receive_quota}
+
+=back
+
+=cut
diff --git a/cloud/microsoft/office365/exchange/plugin.pm b/cloud/microsoft/office365/exchange/plugin.pm
new file mode 100644
index 000000000..c0ffe81c1
--- /dev/null
+++ b/cloud/microsoft/office365/exchange/plugin.pm
@@ -0,0 +1,50 @@
+#
+# Copyright 2018 Centreon (http://www.centreon.com/)
+#
+# Centreon is a full-fledged industry-strength solution that meets
+# the needs in IT infrastructure and application monitoring for
+# service performance.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+package cloud::microsoft::office365::exchange::plugin;
+
+use strict;
+use warnings;
+use base qw(centreon::plugins::script_custom);
+
+sub new {
+    my ( $class, %options ) = @_;
+    my $self = $class->SUPER::new( package => __PACKAGE__, %options );
+    bless $self, $class;
+
+    $self->{version} = '0.1';
+    %{ $self->{modes} } = (
+        'email-activity'            => 'cloud::microsoft::office365::exchange::mode::emailactivity',
+        'mailbox-usage'             => 'cloud::microsoft::office365::exchange::mode::mailboxusage',
+    );
+
+    $self->{custom_modes}{graphapi} = 'cloud::microsoft::office365::custom::graphapi';
+    return $self;
+}
+
+1;
+
+__END__
+
+=head1 PLUGIN DESCRIPTION
+
+Check Microsoft Office 365 Exchange.
+
+=cut