check_o365licenseusage

## check_o365licenseusage

check o365 License usage

### prerequisites

This script uses theses libs :
REST::Client, Data::Dumper, Monitoring::Plugin, File::Basename, JSON, Readonly, URI::Encode

to install them type :

```
(sudo) cpan REST::Client Data::Dumper JSON Readonly Monitoring::Plugin File::Basename URI::Encode
```

this script writes the authentication information in the/tmp directory it will be necessary to verify that this directory exists and that the account which will launch the script has the necessary access permissions.

this scrip use an azure app registration azure with access permissions on graph api : type application, Organization.Read.All et Directory.Read.All.

### Use case

```bash
check_o365licenseusage.pl 1.0.0

This nagios plugin is free software, and comes with ABSOLUTELY NO WARRANTY.
It may be used, redistributed and/or modified under the terms of the GNU
General Public Licence (see http://www.fsf.org/licensing/licenses/gpl.txt).

check_o365licenseusage.pl check o365 License usage

Usage: check_o365licenseusage.pl [-v] -T TENANTID -I CLIENTID -p CLIENTSECRET -H SMTPHOSTNAME [-N LICENSENAME] [-w WARNING] [-c CRITICAL]


-?, --usage
Print usage information
-h, --help
Print detailed help screen
-V, --version
Print version information
--extra-opts=[section][@file]
Read options from an ini file. See https://www.monitoring-plugins.org/doc/extra-opts.html
for usage and examples.
-T, --tenant=STRING
The GUID of the tenant to be checked
-I, --clientid=STRING
The GUID of the registered application
-p, --clientsecret=STRING
Access Key of registered application
-N, --licensename=STRING
name of the license to check let this empty to get all license usage
-w, --warning=threshold
See https://www.monitoring-plugins.org/doc/guidelines.html#THRESHOLDFORMAT for the threshold format.
-c, --critical=threshold
See https://www.monitoring-plugins.org/doc/guidelines.html#THRESHOLDFORMAT for the threshold format.
-t, --timeout=INTEGER
Seconds before plugin times out (default: 30)
-v, --verbose
Show details for command-line debugging (can repeat up to 3 times)
```

sample :

```bash
perl GetLicencesO365.pl -T TENANTID -I CLIENTID -p CLIENTID -N -N OFFICESUBSCRIPTION -w 80 -c 95
```

you may get :

```bash
OK - Microsoft 365 Apps for enterprise (OFFICESUBSCRIPTION) usage : 29.375 % (235/800) | OFFICESUBSCRIPTION_usage=29.37%;80;95
```